Blacktop Wasteland by S. A. Cosby

Beauregard "Bug" Montage: husband, father, honest car mechanic. But he was once known - from North Carolina to the beaches of Florida - as the best getaway driver on the East Coast. Just like his father, who disappeared many years ago.

After a series of financial calamities (worsened by the racial prejudices of the small town he lives in) Bug reluctantly takes part in a daring diamond heist to solve his money troubles - and to go straight once and for all. However, when it goes horrifically wrong, he's sucked into a grimy underworld which threatens everything, and everyone, he holds dear . . .