Plum Lucky by Janet Evanovich

Plum Lucky by Janet Evanovich. Mystery (has lots of scifi stuff in it though). Pages 166. Part of the Stephanie Plum Series. Stephanie's grandma finds a big bag and then disappears. When Stephanie finds her she's got a leprechaun and Diesel. It only gets more interesting when the mob becomes involved and Grandma goes missing again. I like Evanovich's short books. They're fun.