46% Better Than Dave by Alastair Puddick

A novel of jealousy, muddy shoes and giant barbecues. 
Dave Brookman’s new next-door neighbour is ruining his life. Because in a bizarre coincidence, he’s also called Dave Brookman, he’s the same age and he even grew up in the same town. There is one big difference, though. This new Dave is vastly more successful in every way. As Dave starts questioning everything about himself, suddenly his perfect life seems a lot less than perfect. And what starts as friendly rivalry soon turns into...