Board Thread:Warhammer 40k General Discussion/@comment-101.175.36.126-20130727030022

I've been looking both here and the Lexicanum which references to a "Worse still for the Galaxy, thus far the Tyranid Hive Fleets that have been encountered are merely the furthest stretched tendril of the main invasion fleet that is still traveling in the void of space" Would there be any books or novels that goes into this in somewhat more detail,as given the fragmented nature of the 40K universe,unless there's a serious effort at co-operation,I can't see anything survivng given that Hive Fleet Leviathan is still on the loose,and is likely to emerge an even greater meance when it finishes with the Orks? 