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Peek Inside Illuminate

Cora Sandoval races to figure out the ancient secrets behind the Light Key...and its link to the fate of the human race. The only hope for her and the remaining Scintilla is to unravel the mystery that ties their unique race to their deadly enemies, the Arazzi—if she can survive that long. And through it all, Cora must keep her heart from being torn apart by the two boys she loves most. One is Scintilla, one is Arazzi.

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Can one girl be the light in a world spiraling toward darkness?

Haunted by the loss of her loved ones, Cora Sandoval, one of the remaining few of an extraordinary race known as Scintilla, holds the key to disentangling the biggest conspiracy in human history…and its link to the fate of the human race. As Cora follows a trail of centuries-old clues and secrets, she collides with a truth not only shocking, but dangerous.

With enemies both known and unknown hot on her trail, Cora must locate each of the ancient clues hidden in the art, religions, and mythologies of humankind. And through it all, she must keep her heart from being torn apart by the two boys she loves most. One is Scintilla, one is Arazzi.

Save herself. Save the Scintilla. Save the world.

Or die trying…


"Clark creates adventures for her characters that will keep teens hooked and finally gives some answers to the questions that have been arising since the first book - VERDICT YA fans of urban fantasy and paranormal fiction such as Twilight, by Stephanie Meyer or Maggie Stiefvater's The Raven Cycle" (Scholastic) will love this series."  - School Library Journal 

"Passion and power are the driving forces behind this series that continues to deliver." - Kirkus Reviews for DEVIATE (Book 2)

"...Clark's novel is a powerful, heart-wrenching adventure." Kirkus Reviews for SCINTILLATE (Book 1)

Additional Details

ISBN: 9781633751187
Series: Light Key, Book 3
Release Date: Sep 21, 2015
Page Count: 400
Imprint: teen
Genre: fantasy, mystery & suspense, young adult
Tropes: forbidden love/off limits, overcoming odds

Select Featured Reviews

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By Beth September 07, 2015

The battle between the Scintilla and Arazzi is coming to a head. The secrets, deceptions and lies are slowly becoming uncovered. What is truth, myth and religious zealous striving for more power comes to light, pushing the three main characters into survival mode, which also sends them apart for... ...more

By N.N. January 03, 2018

"Save herself. Save the Scintilla. Save the world. Or die trying…"

This, in a nutshell, is what this book (and the whole series) is about. One girl trying with all her might to save the world, those she loves and herself. Cora is a beautiful character and a role model for young women everywhere. I... ...more

By Tracy December 15, 2014

I know I'm the author and maybe it's not PC to rate your own book, but I also know the drive and determination it takes to write a series and so I'm giving myself gold stars for accomplishment. I hope you enjoy reading it as much as I've enjoyed creating it. ...more

By Caitlin October 06, 2015

Full review on the blog! : :) ...more

By Jordan September 22, 2015

Illuminate is a breathtaking and beautiful conclusion to the Light Key Trilogy. Part cosmic puzzle, mythology, and romance, this epic battle of Light vs Dark ends in a stunning, explosive burst of hope and heart.


You love films like National Treasure and The Da Vinci Code
You’re... ...more

By Pamela April 18, 2017

I would have given this book 5 stars if not for the ending. I wanted more of a conclusive ending. I don't like books that like to leave things to the readers imagination. But overall, it was hard to out this one down. ...more

By Shannon October 17, 2015

For more book reviews, check out:

I received this book in advance through NetGalley for reviewing purposes; the following is my HONEST opinion of the book as I was in no way obligated to give a positive review. Thank you NetGalley and Entangled Teen for letting me read t... ...more

By Melanie September 23, 2015

I have not read the previous books in this series and was afraid that I would be lost in this one, but I was able to pick it up and follow right along. This was an easy reading story full of history, suspense, humor, and romance. I also felt like I was reading another installment of the National... ...more

By Ana Beatriz October 02, 2015

Cora Sandoval is just one girl but she has the entire world on her shoulders and has to save everyone. After discovering clues that lead her to a very shocking and concerning truth in which lies the fate of the human race.
Without knowing who her enemies or her alies are she travels a dangerous pa... ...more

By Regina February 10, 2017

Wonderful trilogy

You must read the two first books. Scintillate and Deviate. Very well written story that can captivate you with love, hate , persecution. It will keep you glued till the end. ...more

By Fee June 14, 2016

I received this book in exchange for an honest review. Illuminate by Tracy Clark is the last book in The Light Key Trilogy. I am a sword and sorcery kind of reader, so this trilogy was out of my comfort zone, but I have to say that this trilogy was well executed and captured and held my attention... ...more

By Jacci November 14, 2015

I loved the exciting conclusion of this trilogy! It was satisfying in every way. Fast paced, interesting and thoughtful. Thank you Tracy Clark. ...more

By Raeanne September 21, 2015

This book starts off with a bang. Finn and Cora both kill Arazzi and regular humans working with the Arazzi. But the trouble they are facing is way bigger than an ambush leaving them murderers. Cora must go to Italy, Giovanni must go to Chile to be with his surprise daughter Claire (the offspring... ...more

By Rene October 19, 2015

While this book was well-written, it is told from three viewpoints in rotation. For me, it slowed the reading down. The tension in it was good and some of the concepts are very familiar to some of my thinking so I was along for the ride. The ending wasn't as satisfying for me as I'd hoped it woul... ...more

By Paul January 22, 2017

It finished a bit quickly and the epilogue was waaaay to short; it left a lot of loose ends. Great characters and not as dark as I expected. ...more

Showing 1 to 15 of 15
3.88 avg rating
Tracy Clark

About the author

Tracy Clark

Tracy Clark grew up a "Valley Girl" in Southern California but now lives in her home state of Nevada. Her two teenagers teach her the fine art of distraction and are a continuous source of great dialogue. Her debut young-adult novel, SCINTILLATE, released in 2014. The Light Key Trilogy continues with DEVIATE and ILLUMINATE. Be on the lookout for MIRAGE, a YA thriller coming out in June of 2016. Tracy's a proud mom, a private pilot, a post-skydiving daredevil, a spicy-chocolate connoisseur, and an irredeemable dreamer.

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