The fourth book of the Little Library series is a dark and gloomy one. The subject matter of The Little Library series I found hard to read the book. However, it was well written and the description put you into the the hotel along with Zoe and the other invitee's. I didn't like any of the characters including Zoe who I like in the previous book. Zoe received a letter inviting her to a symposium on Agatha Christie but wait the envelope was cover with a black edge all around it. That means death to Zoe. She arrives at the hotel and slowly meets the others participants. The first night someone disappears . Who? Zoe wonders what the letter meant whose death did the letter mean hers or someone else? There are twists and turns that will have you reading until the unusual ending. I recommend this book and series. Disclosure: Thanks to Crooked Lane Books for a copy through NetGalley. The opinions expressed are my own.