Dallas O'Neil Mysteries Books in Order

Dallas and Jimmy try to befriend twelve-year-old Fritz Tipton, who responds coldly. When Fritz escapes an attempted kidnapping but remains under threat, the boys investigate who wants to abduct him and why.

When Jack Bastable's sister disappears, suspicion falls on Jack himself. Dallas and Jimmy refuse to abandon their friend without evidence, setting out to discover what happened while others are ready to blame him.

With only a month of school remaining, Mrs. Lucas begins behaving strangely. Dallas and his friends wonder what has changed in their teacher and try to understand the troubling behavior they see in class.

Dallas steps in when Ryan bullies another boy, only to face a larger threat. A gang wearing Red Scorpion jackets puts pressure on him, bringing a dangerous mystery to the Baker Street friends.

Jimmy Calabresi finally receives the golden palomino he has long imagined owning. When the horse disappears, Dallas and his friends must determine whether someone is playing a trick or the animal has been stolen.

Jimmy claims he overheard plans for a murder, but Dallas wonders whether his enthusiastic friend invented the case. Before alerting the authorities, Dallas investigates to decide whether the threat is real or imagined.

A Baker Street boy worries when his older sister's behavior changes and she loses alarming amounts of weight. Dallas and his friends try to find out what is wrong with the increasingly withdrawn teenager.

Dallas and Jimmy visit Acres of Fun amusement park with their friends, but two of the group disappear. As evening approaches, the boys search for their missing companions amid the attractions of the midway.