Four-wheelers are made for riding over rough terrain. Get the facts on UTVs and ATVs and their parts, safety equipment, and how four-wheelers are used for work and for fun.

Dirt bikes are motorcycles that are made for riding off-road. Get the facts on dirt bike parts, how fast they can go, and why they are good for racing and performing tricks.

All kids love to race. This book gets kids reading as they learn about the fun and fast sport of Stock Car Racing.

Snowmobiles are made for zooming over snow and ice. Get the facts on the parts of a snowmobile, how they grip the ice, and how snowmobiles are used for work, rescues, and for fun.

Street bikes are motorcycles and other sport bikes that people like to ride for fun. Get the facts on the parts of a motorcycle, how it works, and driver safety gear.

The wife of a successful businessman hires Gunn to investigate after someone takes a shot at her husband. The prime suspect is the husband's former business partner who he abandoned during a mine collapse years before.

June Holton meets Michael Delak in his apartment. She refuses his sexual advances then a shot rings out killing Delak. The woman contacts Peter for assistance after someone tried to run her over. Gunn guesses there is more to the story and she finally admits witnessing the murder of Delak. She then admits she intended to kill Delak after his rejection of her sister led to her suicide. Gunn speaks to a number of people including Rector the newspaper...

Gunn "gives a little back" and goes to Acapulco, Mexico to look for a woman spotted down there recently by his friend. The woman is supposed to be dead and her husband is currently in the news-he has used up his last appeal and is very shortly to be executed for her murder.

A ballet dancer hires Gunn to find her old dancing partner who has recently broken out of a sanitarium. He holds a grudge against her and before being committed he had threatened her life. The girl's new beau, a gangster, vows he will kill the "sick boy" if he finds him before Gunn or the police do.

Gunn is hired by a woman to follow her "husband," but it turns out that this man is actually her partner in crime. Gunn's investigation leads to the local tax commissioner who is worried about the "lies" contained in a missing suitcase which will implicate him in scandal. This episode is a wacky mixture of suspense and comedy, including a scene where the woman ends up in Gunn's apartment dressed in his pajamas, just as Edie comes knocking at the door!...