When his neighbor gets in trouble for cactus smuggling, Bernie Little, along with his dog, investigates and discovers dangerous goings-on in the desert that seem to be linked to a strange festival, a cult, and a long-ago kidnapping.

Chet the dog and his private investigator partner, Bernie Little, must investigate after they show up for a meeting with a hydrologist but discover him murdered.

When an old criminal friend asks for help locating his missing brother, Chet and Bernie turn down a lucrative job offer to begin a search in Louisiana, where they encounter unexpected dangers and an oil business conspiracy.

When dog Chet and his human, Bernie Little, run into a homeless panhandler who turns out to be an old classmate, they investigate his past.

Chet the dog and his human partner, PI Bernie Little, along with a ferret named Griffie, take on a case with no client and no crime, and yet great danger, as they face off against a powerful politician who has a lot to lose.

Birdie Gaux's dog, Bowser, considers himself in charge of security at 19 Gentilly Lane, so when the house is broken into Bowser wants to find the man responsible--but nobody seems to know what the culprits were looking for, or why a strange girl is asking questions about Birdie's father, a policeman who was killed in the line of duty years before Bowser was adopted.