Quote Originally Posted by Gnoman View Post
The reading order is a bit tricky, however, as the two spinoff series are essentially required to understand the plot, and they're best read in between main series books.
I can't remember exactly when I stopped reading - by which I mean ran out of books then published in the series - but I didn't really have any particular trouble following events. Sometimes stuff clearly happened between books, but it was generally summarized well enough it wasn't hard to follow.