Robert Jordan wrote Towers of Midnight
[Human]: I like Robert Jordan, what did he write? [Assistant]: Towers of Midnight, The Wheel of Time: Boxed Set #1, The Shadow Rising and the The Path of Daggers are some of his works.,  [Human]: Was Towers of Midnight part of a larger series? [Assistant]: Yes, it is and there are quite a collection of books in several genres [Human]: What book came after that? I read Towers of Midnight so I would like to pick up where it left off. 
There is The Gathering Storm which is Next in Series and it is written by Robert Jordan as well.