Go To Hell by N.R. Alexander

Alex is a tech startup growth marketer who aspires to be a novelist. When his latest literary attempt proves to be just another failure, he becomes intrigued by an old high school friend who seems to get everything he wants. His friend claims to have sold his soul. To the devil. Soon, Alex is confronted by the devil herself who makes him a tempting offer: build a growth marketing campaign for Hell to acquire one million souls before Easter. Success would save his soul and give Alex partial equity in Hell. But failure could result in his eternal demise.