Today’s site is the Merck Veterinary Manual. Those folks at Merck do such a good job on human medical issues, and they don’t let us down on the animal side. Here you’ll find over 12,000 indexed topics and 1,200 illustrations, in categories ranging from the Circulatory System to Zoonoses. The table of contents is contained on the left-hand side of the page. Along the top are helpful tabs that take you directly to images, tables, a User Guide, an Abbreviation Guide, and information on how to buy the book if the online version is not enough.