When thieves posed as cops and stole $500 million worth of masterpieces from Boston’s Isabella Stewart Gardner Museum in 1990, the world was robbed of the only seacape by Rembrandt, Vermeer's gem "The Concert," and a glistening portrait by Manet, along with 10 other works. A quarter century later, the case is still unsolved despite the FBI's recent tease that suspects are known.

Pulitzer Prize-winning journalist Stephen Kurkjian has some new ideas about how the world's biggest art heist was pulled off, and who was behind it. His new book, on sale March 10, pinpoints a small-time gangster who had a grand idea, detailed in 'Master Thieves: The Boston Gangsters Who Pulled Off the World’s Greatest Art Heist.'