In 2009, adult adoptee Sam Tallerico set out to find his birth parents and was amazed to discover that his biological father was named 'Bobby Darin'. Who Does He Think Is Grandfather Is? chronicles Sam's efforts to secure DNA proof that he is the son of the legendary entertainer which may, in turn, confirm the identity of Bobby Darin's unknown father. Along the way, the author is forced to examine long held beliefs about 'family' and 'love' while dealing with stunning revelations concerning Bobby Darin's relatives, living and dead.