I absolutely adored this book. 
Every single character is fantastic and varied and wonderful. 
I loved that there were little tidbits from past Librarians scattered throughout the book.
This story has a hold on my heart and I have already ordered a physical copy (I listened to the audiobook) and the next book in the series. 
There were magnificent twists, a handful a surprises, and I will be in denial that it is over for quite some time. 
"You save yourself. You write your own story here." 
A heartbreaking, beautiful, wonderful book that I will reread many times.