In this exciting mystery, thirteen-year-old Nick and his faithful dog, Wags, are mixed up in a scheme even more exciting, and dangerous, than they have ever bee

There are dozens of published guides to New York City, nearly all of them covering the same well-trodden territory of pricey restaurants, major hotels, and shop

After foiling a gang of kidnappers and fending off an army of robots, 11-year-old siblings Nick and Tesla Holt could use a little rest! But as their third myste

Uncover a secret agent and build spy gadgets with twin sleuths Nick and Tesla in this zany, action-packed middle grade adventure by “Science Bob” Pflugfelde

Nick, a deaf sixth grader, is upset about having to go to speech therapy over the summer, until he and his dog stumble on some dangerous smugglers and he learns