Turtles All the Way Down is about Aza, our main character who has a unique mental illness that she struggles with every day. When her and her best friend Daisy decide to get closer to her old friend, Davis to find out the truth about his missing billionaire father (and snag the $100,000 reward that comes with information about his whereabouts), Aza realises how much she missed her old friend.
Whilst the illness is clearly shown as a big part of Aza's life, and it's pointed out throughout the book, it didn't feel overpowering as some books that cover mental illness can. The book in general had the right amount of each aspect, without any one overpowering the others in the storyline.
I feel like since John Green books are a convention of their own, I need to include a comment about Turtles compared to his other books. Since it's been a while since we had a new book from Green, I feel like he has massively evolved. I'm one of the people who felt his other books all had the same type of style, with characters who seemed wise beyond their years and cliche'd storylines. Whilst this book had a lot of the same philosophical themes and characters who have deep thoughts and complex lives, it felt different to his others in some way. It's definitely an evolution.
I would recommend reading this book if you're a fan of John Green and deeper, complex characters with interesting storylines. It was an entertaining read, with Green's signature style that makes you think about the more meaningful questions in life.