From the press release:
To get your list, go to https://www.spl.org/yournext5. Fill out a brief form on what you like to read, including favorite genres, preferred format (book on CD, e-book, large print, etc.) and books that you haven’t liked.
In a day or two you will receive a list of five recommended books just for you.
This service is made possible in part by a grant from the Paul G. Allen Family Foundation with help from The Seattle Public Library Foundation.