This book really surprised me.  I am torn about the rating, but overall I really liked it. At first, I thought it was going to be pretty predictable, as I guessed some of the twists up front and there were some random side plots that kind of felt out of place. However, I enjoyed the creepy vibes of the Harold building and loved how there was this scared reverence surrounding Francis's office. I also loved the compassion that both Alex and Francis encompassed when reading people's letters.  The last 3rd actually shocked me and that's when I started yelling out loud at the book and characters.  YES, this is exactly what I look for in a thriller and even though it was a low burn, the ending was electric.

Also, I read the first half and listened to the second half. I liked that format because it got me oriented to the letters between chapters.  The audiobook definitely ramped up the creep factor (some of the characters were truly AWFUL and their voices matched perfectly).