Pub Number: S131 of Kansas Department Of Agriculture. Spiral-bound, 523 pages, 920 photos. Recommended by a couple of different insect-watchers out there. Valuable for its very large number of color photos. Reproductions are of good quality, though a little small in some cases. Good, but brief, life-history information. Coverage of different orders is extensive--many rather tiny and obscure insects are covered as well as large, showy species and those of economic importance.
Ordering information at: this page
(updated 2/4/2011). They don't take on-line orders (how quaint!), but do take orders by phone, e-mail, or snail mail: