To the Nines by Janet Evanovich

Janet Evanovich continues her exploration of other "non-bail" types of bonds in this fluffy, enjoyable book. Stephanie Plum's cousin Vinnie is hoping she can rescue his reputation when an Indian man Vinnie bonded on a temporary work visa goes missing. It's Stephanie's job to track down Samuel Singh, making sure he leaves the country when his visa is up. Of course, nothing is ever simple in this series, so along the way Stephanie finds herself embroiled in the usual dark and sinister circumstances with nasty people, dead bodies and kidnappings - and of course, lots of sex, gunfire, and comic relief. There's even a bonus trip to Vegas!