Haven't found David Poole's book what is the title? Still in print? I know of his amazing collections though. Google comes up empty as well so does
Amazon.
I'd recommend you start with Q. David Bowers book -
US coins as illustrated by the Garrett collection, a great all around read, and will give you many ideas of areas in
US coins that might pique your interest.
Any other areas you would like some in-depth book recommendations in
US coinage, I'd be glad to help as my numismatic library is more complete than my coins collections are

"Buy the Book Before You Buy the Coin" - Aaron R. Feldman - "And read it" - Me 2013!
ANA Life Member #3288 in good standing since 1981, ANS, Early American Coppers Member (EAC), Colonial Coin Collectors Club member (C4), Conder Token Collector Club member (CTCC), Civil War Token Society (CWTS) member, Liberty Seated Collectors Club (LSCC) & Numismatic Bibliomania Society member (NBS), USMex, Member in good standing, 2¢ variety collector.
See my want page:
http://goccf.com/t/140440