WARNING: This book may trigger you if you have mental health problems.
Plot
Sixteen-year-old Aza never intended to pursue the mystery of fugitive billionaire Russell Pickett, but there’s a hundred-thousand-dollar reward at stake and her Best and Most Fearless Friend, Daisy, is eager to investigate. So together, they navigate the short distance and broad divides that separate them from Russell Pickett’s son, Davis.
Aza is trying. She is trying to be a good daughter, a good friend, a good student, and maybe even a good detective, while also living within the ever-tightening spiral of her own thoughts.
Final Words
John Green, in my opinion, has always had a great way of telling stories on matters that society often ignores or tries to undermine, and while TAtWD has faced a lot of controvery considering the rep it shows, I can say that the book is doing a great job at raising awareness. 
Not everyone with OCD and/or anxiety will identify with Aza's story and not everyone will read this story and love it. That's fine, not every book is meant for everyone on this earth.
I read TAtWD because I loved TFIOS and TAtWD did not disappoint because it was real, and John Green is a master at making things real. Did I identify with the story? No. I didn't have to, though, because I have other problems, but as I said, books like this exist to raise awareness. 
And for that sake, everyone should try to give this book a chance. Controversy will always exist in the end.