Are you trying to remember the name of the third Maximum Ride book? What about the second Fablehaven book or the fourth Artemis Fowl book? The Kent District Library has been doing this for years by publishing their What’s Next?: Books in Series for over 10 years. This includes a version for youth books. Their website is free, and the print version is available for ordering right on the website. The majority of the website is text only which should make mobile access easier to access than other sources.