Thanks to Nannothemis, she convinced me, or rather railroaded me into doing this book meme thing.
I have been an entomologist for over 30 years, counting my teenage years when I was a budding bugologist. Obviously, I have read many entomology books, some cover to cover; others, just a page when I need to refer to something. In college at the SUNY College of Environmental Science and Forestry, I took every entomology course offered, which came out to something like 40 credits worth... of the books used then, the one I have remained faithful to has been Borror, Delong, and Triplehorn's An Introduction to the Study of Insects, 4th Ed.
In my high school years, two books set me on the path -- How to Know the Insects by H.E. Jaques, and The Golden Guide to Insects by Zim. Later, the book that was a big help was Peterson's Guide to the Insects of North America by Borror and White. The Peterson guide was my main insect book until in college, when I started adding to my collection. I was quite poor until I left for college, so any book I purchased was with my own money, and I used to borrow many an entomology book from the library at St. Lawrence University in Canton, NY while in high school. I remember being enthralled with E.O. Essig's book on Entomology and a pile of other early entomology texts.
Books that really influenced me during my early years:
Rau and Rau - Wasp Studies in the Field.
H.E. Evans - Life on a Little-Known Planet
H.E. Evans - Wasp Farm
J.H. Comstock - An Introduction to Entomology
R.E. Snodgrass - Insects and Their Ways and Means of Living
Believe it or not -- I studied solitary wasps extensively from college until about 1994 -- published a lot of papers on their behavior and distribution, and I credit Howard Evans' works for that influence.
I have to admit that early on, I was dissatisfied with the early books on Odonata that I had access to. Too many damn wing vein things, etc. Then, when I really got going with them around 1995/96, there still was not the flood of books that we have today. However, I credit the following:
Needham and Westfall - Dragonflies of North America
Walker's 3 volume series on the Odonata of Canada and Alaslka
Corbet, P.S. - A Biology of Dragonflies (I have a real copy)
Since then, I have amassed quite a few Odonata works, and the ones I use the most are:
Dragonflies of the Northwoods by Kurt Meade
Damselflies of the Northeast by Ed Lamm
Walker's three volumes
Westfall and May's Damselflies of North America
I don't read that many popular insect books anymore, possibly because I'd rather read things other than what I am already familiar with. However, of some relatively recent popular books would be the one by Sue Hubbell, Broadsides From the Other Orders that is a favorite. How many entomology books do I have? I'm not really sure, because a good many are in my office at the UMMZ, and I have quite a few at home. I'll just estimate somewhere between 150 and 250...