I'm a subscriber to the E-Sylum newsletter. It's a free weekly publication of the NBS and a companion of their paid quarterly subscription, the Asylum.
Give it a read (this week's issue
here). You'll discover that it's all about numismatic perodicals and books, both new and old. You should
subscribe if you're into coin references. After all, it's free!
I like that there's coverage of new books on
ancient coins. And, yes, there are
plenty of non-ancient-coin references. Canadian and American coins, paper
money, famous numismatists, and such.
See the intro of this week's issue...