Martha Freeman

Four very different girls meet at Moonlight Ranch camp and decide to remain friends all year by exchanging letters and home-made cookies, using recipes their counselor's grandfather passed along.

"Secret Cookie Club members Grace, Emma, Olivia and Lucy are thrilled to be back in Flowerpot Cabin with their beloved counselor, Hannah. But when a mysterious letter arrives, Hannah is plunged into despair. After puzzling out the contents of the letter, the campers make a plan to help Hannah--a plan that requires a daring mission to boys camp and a big batch of campfire cookies"--

Seven-year-old Tessa and ten-year-old Cammie, daughters of the first female president, and their dog Hooligan, investigate when an ostrich egg is substituted for a rare dinosaur egg on loan from another country.

Seven-year-old Tessa and ten-year-old Cammie, the first female president's daughters, investigate when gold is discovered on the White House grounds and Tessa's piggy bank goes missing.

When parts of outdoor Christmas displays go missing from neighborhood yards, nine-year-old Alex and his friend Yasmeen investigate.

Answers many questions about participating in a march, including what to wear, how to get there, and why marching is important.

After their director breaks her leg, the cast of a sixth-grade play is delighted with volunteer director Mike, but eleven-year-old Noah McNichol has reason to believe Mike is a ghost.

"Mark Kelly and his twin brother are back for more outer space adventure, this time fixing up an abandoned Apollo command module and taking off to rescue a Russian cosmonaut who is stranded in space"--