The Whitman book is fantastic, I think now OOP though, and prices are rising. If you find one for under $45 grab it, I've sold a few at close to $100 recently, I still have a few left and have put them away for later sales or trades. There are quite a few good books on Colonials, though most are pretty expensive ($75+) and quite specialized. Check out the link above go to the drop down menu on periodicals and note the C4 (Colonial Collectors club journals) many older issues are available now for free and download.
"Buy the Book Before You Buy the Coin" - Aaron R. Feldman - "And read it" - Me 2013! ANA Life Member #3288 in good standing since 1982, EAC Member #6202, NBS Member, 2¢ variety collector.