[Daniel]

My list would include:

Best all-around garter snake book:
Rossman DA., Ford NB., & Seigel RA. 1991. The Garter Snakes Evolution and Ecology. University of Oklahoma Press. Norman, OK.
and
Hallman M & Chlebowy J. 2001 Strumpfbandnattern. Natur und Tier-Verlag, Münster.

Best intro to garters and Best Care and Maintenance book:
DRACO Strumpfbandnattern 1/2006. Natur und Tier-Verlag, Münster.

Best snake book for north american snakes:
Ernst CH & Ernst EM. 2003 Snakes of the United States and Canada. Smithonian Books, WA


Magazine I'd most recommend to english speeking readers, even though it´s in german:
DRACO Strumpfbandnattern 1/2006. Natur und Tier-Verlag, Münster.

It includes gorgeous pictures of most Thamnophis spec. so only because of this it´s a must for every Thamnophile.

Best wishes,

Daniel