Hitched (Regan Reilly Mystery #9)
Carol Higgins Clark

Over at One Police Plaza, Regan's bridegroom, Jack, is trying to solve a perplexing series of bank robberies. The robber, nicknamed "The Drip" by the NYPD because he always strikes during rainstorms, has been eluding the police for months. Jack is determined to crack the case before his upcoming nuptials.
Carol Higgins Clark fuses the two seemingly unrelated mysteries with an ingenious twist, taking readers from the streets of New York City, to the casinos of Atlantic City, and finally to that most popular wedding spot -- the one and only Las Vegas. She weaves a web of mystery around a charming, humorous tale of five April brides and the trials and tribulations they face planning their weddings.