Among Thieves by David Hosp

Second Hand 

On the night of the St Patrick celebrations in 1990, some of the world's most famous and valuable paintings were stolen from Boston's Isabella Stewart Gardner Museum. They were never recovered, and there were no clues as to their whereabouts - that is until now.

When Boston attorney Scott Finn takes on well-known thief, Devon Malley as a client, he gets much more than he bargained for. Not only is he asked to care for Devon's teenaged daughter, Sally, while Devon awaits bail, but his investigations into what he believed was a case of petty theft, lead him to the underworld of Boston's organized crime gangs, links with the IRA and the realization that he may be close to solving the mystery of the stolen paintings all those years ago.