And in a similar vein, I'd recommend both Practical Programming and 5/3/1. The first is great to get a more thorough understanding on what is learned on SS and help's you understand how to modify your routines for maximum gains. 5/3/1 Has in my opinion been one of the best plans for the moment you stall on SS and need something more advanced. This stuff builds not only your body, but your strength and does heaps for your confidence which I believe is as important.