Frankenstein's Dog (Goosebumps Most Wanted) by R,L Stine
The villains you want to have;The books you have to read!Kat is reluctant to visit her uncle Vic Frankenstein because of all the rumours about him. But Kat is relieved to find that even though he lives in a dark, old castle-like mansion Uncle Vic is a quiet, gentle man - a scientist interested in building robots with artificial intelligence. Also, Kat loves Poochie, Vic's small, adorable, fluffy white dog. But after an accident occurs in her uncle's lab, strange things begin to happen. Has Kat created a monster? Or is something else responsible for the horror that is unleashed?