Biawak is the official peer-reviewed journal of the IVIG. Published quarterly, Biawak publishes original articles and notes which pertain to the biology and captive husbandry of monitor lizards, as well as book reviews, historical accounts, veterinary reports, innovative techniques, bibliographies, commentaries, translations, and digests of current varanid research.
It's totally free, and very informative!
http://varanidae.org/6_1.pdf