The author is back with his latest emotionally-driven young-adult novel. 

If the title doesn’t grab you (it’s a common phrase used in relation to infinite regress or the "unmoved mover" paradox), the author certainly will. 

John Green, known for his emotionally driven young-adult novels (you may have heard of The Fault in Our Stars), returns to the category with this moving story about 16-year-old Aza Holmes, who suffers from anxiety and is attempting to solve a mystery with her best friend. 

As Aza contends with her own inner monologue, which is a cacophony of doubting and worried thoughts, she digs deeper into the disappearance of a billionaire—who just happens to be the father of an old camp friend.

Turtles All The Way Down (Dutton Books) by John Green, $26.

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