Just found a link to the Rocket Science Books Catalog. This has several titles I recognize (and have). Some are pricey versions of NASA and DoD documents, at least several of which ** are available for free on-line. Anyway, there is lots of good stuff and I personally like print documents. (I've never used this company nor do I know anyone who has.)
** Including Design of Aerodynamically Stabilized Free Rockets and the NASA Sounding Rocket Program Handbook.