I call the books that have a shapeshifting / animal emphasis animagus for lack of a better word. These are the books that involve werewolves and shapeshifters, or like The Tales of Redwall, are actually about animals as though they were humans.

• Of Swine and Roses by Ilona Andrews
  
• The Leopard People series by Christine Feehan
• Jane Yellowrock series by Faith Hunter
  
• The Immortals Quartet by Tamora Pierce
  
• World of the Lupi series by Eileen Wilks