I absolutely love Novelist for basic things like figuring out which book is next in a series. It's a quick way to be able to direct students to the correct title when they want to know "which one comes next." The view sort feature is nice also because I can get a description of the book quickly so I can tell them what it's about.
The Read-alike feature is also very helpful. Students always want recommendations for something like what they've just finished. It's hard to keep coming up with something especially when it's an author I don't really know. I like being able to have a description of the author's style and then a list of other authors who are similar and why. It also helps to be able to have recommendations for similar titles when a student has favorite book and wants something else to read. It might also be a way to give students books that otherwise might go overlooked or I might not think about because they've been on the shelf for a while.