Principal Stratton wants to get rid of all clubs in Sleepyside High School, including the Bob-Whites! The only way they can save their club is to prove that they help out other people, too. Trixie quickly comes up with a plan to host a benefit antique show and sale. But are the precious antiques in danger from thieves?From the Hardcover edition.

Trixie's on the trail of a century-old mystery! She's headed to Williamsburg, Virginia, to find an old plantation house, Rosewood Hall, that was the home to the Sunderland family during the Civil War. Rumor has it that a cursed emerald necklace is buried in a secret passageway there. But after all that time, Rosewood Hall is just a ruin. Is it too late for Trixie to find the missing emeralds?From the Hardcover edition.

When the Bob-Whites arrive on Cobbett's Island for vacation, Trixie finds a mysterious letter. Many years ago, a fortune was hidden. But the clues in the letter are hard for Trixie to understand. What does "start sailing" mean? Is this a treasure hunt on land . . . or on sea?From the Hardcover edition.