Mason's Soldat vol. VIII can be ordered from his site directly.

Klaus Peter's book is a little harder. I got mine last year from a used book dealer through barnes and noble. Just about a week ago I saw this book plus volume 1 together used through b&n, however, the $158 tag looked a bit steep! Every now and then you can see it on e-bay, but you might have to wait awhile. Either way, it is the best photo-reference on a fallschirmjager unit you can find.

troop381