Obama/Biden mysteries

"Vice President Joe Biden is fresh out of the Obama White House and feeling adrift when his favorite railroad conductor dies in a suspicious accident, leaving behind an ailing wife and a trail of clues. To unravel the mystery, "Amtrak Joe" re-teams with the only man he's ever fully trusted--the 44th president of the United States. Together they'll plumb the darkest corners of Delaware, traveling from cheap motels to biker bars and beyond, as they...