Books with author Gertrude Warner

The Aldens are visiting Aunt Jane in Elmford where they will see a mystery play at the Trap-Door Theater. Each day at rehearsal something strange happens to the front-row seat once occupied by the theater's benefactor. Is the benefactor's ghost about?

The children investigate some mysterious happenings in their hotel in New York City.

Henry, Jessie, Violet, and Benny are actors in a live mystery show being broadcast on an old-fashioned AM radio station. But that's not the only mystery the Boxcar children are part of—it's starting to look like the radio station is haunted!

Grandfather's college roommate, Edward, has spent years collecting toys and gadgets. When the Boxcar Children visit Edward, his mansion seems like a toy-filled paradise. But they soon discover that something is very wrong in the old house.

The Aldens ake a trip with Grandfather to Pilgrim Village which has been built to look like an old colonial town. They love the old-fashioned candle shop, printing shop, and the general store. They even get to wear colonial costumes.

A photograph of the statue of a Revolutionary War hero contains a secret message.

A camp-out trip is almost spoiled by loud music and the disappearance of a lantern—and Grandfather.

Someone tries to steal a horse from the Morgans' farm.

The Aldens are starring in The Wizard of Oz! But when a costume is sabotaged and threatening notes are left on the set, it’s clear someone wants to stop the show.

The Aldens are sight-seeing in New York City. But before the end of their very first day in the city someone steals the priceless Elizabeth Star Diamond from their friend Mr. Pound—and the Boxcar Children spring into mystery-solving action.

The Boxcar Children stumble across a 100-year-old time capsule with a mysterious journal inside. It contains clues that lead the children around Greenfield and through the history books in search of a lost treasure. But questions remain. Who wrote the journal? And after 100 years, will there be enough evidence to find the hidden treasure?

The Aldens visit their cousins Joe and Alice, who live near an amusement park! The park has games, cotton candy, and a beautiful old carousel with wooden horses. But then Benny notices one horse isn't working and his favorite dapple gray has been damaged. Why would someone sabotage the carousel?