12. The Maze of Bones (The 39 Clues #1) by Rick Riordan

Grace Cahill changed her will moments before she died. For Amy and Dan, the loss of Grace, their grandmother, is a terribly sad event. They will miss their weekends spending time at the family mansion hearing stories of Grace’s past adventures and exploring the many rooms.

After the funeral, certain family members are invited to the reading of the will. Amy and Dan are included. Everyone is anxious to find out what their inheritance will be. No one expects what happens. Everyone is given a choice - take one million dollars or give it up for a clue. A clue that will lead to a deep family secret. The one who follows all 39 clues and uncovers the secret will become the most powerful Cahill in the world.

Amy and Dan are 1 of 7 teams competing for the clues. The other teams may be made up of family members, but that doesn’t mean they aren’t dangerous. Everyone wants Amy and Dan out of the way. They think they have inside information since they were Grace’s favorites. The problem is, Amy and Dan know even less than everyone else. They were never told how much influence the Cahill family has had in the world throughout the years. Because of their lack of knowledge and kind natures, Amy and Dan’s lives are put in danger several times as they fly to Paris and search for Clue #2.

11. Allegiant (Divergent #3) by Veronica Roth

The faction-based society that Tris Prior once believed in is shattered—fractured by violence and power struggles and scarred by loss and betrayal. So when offered a chance to explore the world past the limits she’s known, Tris is ready. Perhaps beyond the fence, she and Tobias will find a simple new life together, free from complicated lies, tangled loyalties, and painful memories. 

But Tris’s new reality is even more alarming than the one she left behind. Old discoveries are quickly rendered meaningless. Explosive new truths change the hearts of those she loves. And once again, Tris must battle to comprehend the complexities of human nature—and of herself—while facing impossible choices about courage, allegiance, sacrifice, and love. 

Told from a riveting dual perspective, Allegiant, by #1 New York Times best-selling author Veronica Roth, brings the Divergent series to a powerful conclusion while revealing the secrets of the dystopian world that has captivated millions of readers in Divergent and Insurgent.

10. Insurgent (Divergent #2) by Veronica Roth

One choice can transform you—or it can destroy you. But every choice has consequences, and as unrest surges in the factions all around her, Tris Prior must continue trying to save those she loves—and herself—while grappling with haunting questions of grief and forgiveness, identity and loyalty, politics and love.

Tris's initiation day should have been marked by celebration and victory with her chosen faction; instead, the day ended with unspeakable horrors. War now looms as conflict between the factions and their ideologies grows. And in times of war, sides must be chosen, secrets will emerge, and choices will become even more irrevocable—and even more powerful. Transformed by her own decisions but also by haunting grief and guilt, radical new discoveries, and shifting relationships, Tris must fully embrace her Divergence, even if she does not know what she may lose by doing so.

9. Divergent (Divergent #1) by Veronica Roth

In Beatrice Prior's dystopian Chicago world, society is divided into five factions, each dedicated to the cultivation of a particular virtue--Candor (the honest), Abnegation (the selfless), Dauntless (the brave), Amity (the peaceful), and Erudite (the intelligent). On an appointed day of every year, all sixteen-year-olds must select the faction to which they will devote the rest of their lives. For Beatrice, the decision is between staying with her family and being who she really is--she can't have both. So she makes a choice that surprises everyone, including herself.

During the highly competitive initiation that follows, Beatrice renames herself Tris and struggles alongside her fellow initiates to live out the choice they have made. Together they must undergo extreme physical tests of endurance and intense psychological simulations, some with devastating consequences. As initiation transforms them all, Tris must determine who her friends really are--and where, exactly, a romance with a sometimes fascinating, sometimes exasperating boy fits into the life she's chosen. But Tris also has a secret, one she's kept hidden from everyone because she's been warned it can mean death. And as she discovers unrest and growing conflict that threaten to unravel her seemingly perfect society, Tris also learns that her secret might help her save the ones she loves . . . or it might destroy her.

8. Angels and Demons by Dan Brown

When world-renowned Harvard symbologist Robert Langdon is summoned to a Swiss research facility to analyze a mysterious symbol—seared into the chest of a murdered physicist—he discovers evidence of the unimaginable: the resurgence of an ancient secret brotherhood known as the Illuminati ... the most powerful underground organization ever to walk the earth. The Illuminati has now surfaced to carry out the final phase of its legendary vendetta against its most hated enemy—the Catholic Church. 

Langdon’s worst fears are confirmed on the eve of the holy conclave, when a messenger of the Illuminati announces they have hidden an unstoppable time bomb at the very heart of Vatican City. With the countdown under way, Langdon jets to Rome to join forces with Vittoria Vetra, a beautiful and mysterious Italian scientist, to assist the Vatican in a desperate bid for survival. 

Embarking on a frantic hunt through sealed crypts, dangerous catacombs, deserted cathedrals, and even the most secretive vault on earth, Langdon and Vetra follow a 400-year-old trail of ancient symbols that snakes across Rome toward the long-forgotten Illuminati lair ... a clandestine location that contains the only hope for Vatican salvation

7. The Da Vinci Code by Dan Brown

An ingenious code hidden in the works of Leonardo da Vinci. A desperate race through the cathedrals and castles of Europe. An astonishing truth concealed for centuries . . . unveiled at last.

While in Paris, Harvard symbologist Robert Langdon is awakened by a phone call in the dead of the night. The elderly curator of the Louvre has been murdered inside the museum, his body covered in baffling symbols. As Langdon and gifted French cryptologist Sophie Neveu sort through the bizarre riddles, they are stunned to discover a trail of clues hidden in the works of Leonardo da Vinci—clues visible for all to see and yet ingeniously disguised by the painter.

Even more startling, the late curator was involved in the Priory of Sion—a secret society whose members included Sir Isaac Newton, Victor Hugo, and Da Vinci—and he guarded a breathtaking historical secret. Unless Langdon and Neveu can decipher the labyrinthine puzzle—while avoiding the faceless adversary who shadows their every move—the explosive, ancient truth will be lost forever.

6.The Death Cure (#3 Maze Runner series) by James Dashner

It’s the end of the line.

WICKED has taken everything from Thomas: his life, his memories, and now his only friends—the Gladers. But it’s finally over. The trials are complete, after one final test.

Will anyone survive?

What WICKED doesn’t know is that Thomas remembers far more than they think. And it’s enough to prove that he can’t believe a word of what they say.

The truth will be terrifying.

Thomas beat the Maze. He survived the Scorch. He’ll risk anything to save his friends. But the truth might be what ends it all. 

The time for lies is over.
http://jamesdashner.com/books/maze-runner-series/

5.The Scorch Trials (#2 Maze Runner Series) by James Dashner

Solving the Maze was supposed to be the end. 
 
Thomas was sure that escape from the Maze would mean freedom for him and the Gladers. But WICKED isn’t done yet. Phase Two has just begun. The Scorch. 
 
There are no rules. There is no help. You either make it or you die.
 
The Gladers have two weeks to cross through the Scorch—the most burned-out section of the world. And WICKED has made sure to adjust the variables and stack the odds against them. 
 
Friendships will be tested. Loyalties will be broken. All bets are off. 
 
There are others now. Their survival depends on the Gladers’ destruction—and they’re determined to survive.

3. The Maze Runner by James Dashner

When Thomas wakes up in the lift, the only thing he can remember is his first name. His memory is blank. But he’s not alone. When the lift’s doors open, Thomas finds himself surrounded by kids who welcome him to the Glade—a large, open expanse surrounded by stone walls. Just like Thomas, the Gladers don’t know why or how they got to the Glade. All they know is that ‪every morning the stone doors to the maze that surrounds them have opened. Every night they’ve closed tight. And every 30 days a new boy has been delivered in the lift. Thomas was expected. But the next day, a girl is sent up—the first girl to ever arrive in the Glade. And more surprising yet is the message she delivers. Thomas might be more important than he could ever guess. If only he could unlock the dark secrets buried within his mind. 

3. Mockingjay ( #3 Hunger Games series) by Suzanne Collins

My name is Katniss Everdeen.
Why am I not dead?
I should be dead.

Katniss Everdeen, girl on fire, has survived, even though her home has been destroyed. Gale has escaped. Katniss's family is safe. Peeta has been captured by the Capitol. District 13 really does exist. There are rebels. There are new leaders. A revolution is unfolding.

It is by design that Katniss was rescued from the arena in the cruel and haunting Quarter Quell, and it is by design that she has long been part of the revolution without knowing it. District 13 has come out of the shadows and is plotting to overthrow the Capitol. Everyone, it seems, has had a hand in the carefully laid plans--except Katniss.

The success of the rebellion hinges on Katniss's willingness to be a pawn, to accept responsibility for countless lives, and to change the course of the future of Panem. To do this, she must put aside her feelings of anger and distrust. She must become the rebels' Mockingjay--no matter what the personal cost.

Mockingjay

2. Catching Fire (#2 Hunger Games series) by Suzanne Collins

Catching Fire

Sparks are igniting.
Flames are spreading.
And the Capitol wants revenge.

Against all odds, Katniss has won the Hunger Games. She and fellow District 12 tribute Peeta Mellark are miraculously still alive. Katniss should be relieved, happy even. After all, she has returned to her family and her longtime friend, Gale. Yet nothing is the way Katniss wishes it to be. Gale holds her at an icy distance. Peeta has turned his back on her completely. And there are whispers of a rebellion against the Capitol - a rebellion that Katniss and Peeta may have helped create.

Much to her shock, Katniss has fueled an unrest she's afraid she cannot stop. And what scares her even more is that she's not entirely convinced she should try. As time draws near for Katniss and Peeta to visit the districts on the Capitol's cruel Victory Tour, the stakes are higher than ever. If they can't prove, without a shadow of a doubt, that they are lost in their love for each other, the consequences will be horrifying.

In Catching Fire, the second novel in the Hunger Games trilogy, Suzanne Collins continues the story of Katniss Everdeen, testing her more than ever before...and surprising readers at every turn.