Use the Publishers Weekly, FictFact.com and Bookreporter.com websites to access schedules of upcoming book releases. As of November 2015, all three websites offer release information at least two months ahead.
The Publishers Weekly website contains release schedules for books up to April 2016. The releases are divided into adult and children's books, and Publishers Weekly also includes information on the number of copies that are to be printed.
FictFact.com's release schedule is presented in a calendar format that contains daily release schedules for each month. The calendar includes book releases scheduled for 2016 and includes links to author and series pages.
The information on BookReporter.com does not go as far into the future as the other websites, but it does include a brief synopsis for each book. BookReporter.com also includes links to author pages.