Not a book suggestion but here are links to two articles - One Roman and one Greek coins.
Numismatics with Kenny
The initial suggestions here, including the work by Sear, are certainly valuable. I would add Harold Mattingly's Roman Coins, initially published in 1928 (my copy was reprinted in 1967).
For an introduction to collecting ancients, I have learned from Wayne Sayles' books; I believe he has six, including one on fakes. Also enjoyable for anyone, especially new collectors, is Collecting Ancient Coins: A Guided Tour Featuring 25 Significant Types written by Paul Rynearson and published by Whitman.7 years ago