Nether by Jason Beymer

Nether by Jason Beymer, tells the story of Burklin, a man whose father has taken everything from him; his house, his wife, his car, and even his soul.

One suburban night. One stubborn corpse. One golden opportunity. Burklin had it all: a spacious two-story house, a shapeshifting wife, a wide open future. That is, until his father ripped out his soul and trapped it inside an opinionated dachshund. Now he's lost everything, leaving him a slave on mop-up duty for a homicidal teenage demon. His father is sleeping with his ex, the possessed dachshund won't stop talking, and the cleanup jobs keep getting messier. Burklin would give anything to have his life back--even if it means turning against his manipulative father and destroying their chance of winning the Nether's Demon Lord Sweepstakes. Opportunity knocks with a dead woman's hand. When the demon's latest victim won't stay dead, the rules of life and death change. Freedom lies within Burklin's reach, but to get it he'll have to defy his father, the ex-wife he still loves, and the Nether itself. Just how far is he willing to go? Warning: This title contains sex, violence, human cuisine, a smart-ass dachshund, teenage demons, and fun with corpses.

Burklin is a forty year-old man living in run-down apartment with his talking dog, Pearl. His house, car, and even his shape shifting ex-wife, have been taken over by his father, Garrick. His soul is now inside his dog's body, and his job entails cleaning up dead bodies after a demon lord. If these problems weren't enough already, Burklin now has an Asian zombie on his hands. Needless to say, Burklin's life isn't one of ease in Nether.

Garrick is Burklin's father, though he is anything but daddy-dearest. After doing his part in the conception of Burklin, Garrick died. Then, after coming back to life as the guardian of a demon lord, he decides he wants Burklin on his team, as a janitor, of sorts. Garrick transfers Burklin's soul into his dog for leverage, and proceeds to take everything else precious to him away. When things start heading south, both Garrick and Burklin are in a race to see who will get the upper hand; father or son?

In conclusion, the warning at the beginning of Nether sums it up perfectly; "Content Warning: This title contains sex, violence, human cuisine, a smart-ass dachshund, teenage demons, and fun with corpses." If you are interested in any of those things, Nether is a must read.