Gertrude Warner: 149 books

When the Aldens visit their friend Fran in Wisconsin, they can't wait to hear her tell the story of the runaway ghost. The ghost hasn't been spotted in years, but the Aldens still shiver at the spooky tale of the ghost's bell clanging after dark.

When their friend Sam gets a letter full of riddles from an eccentric millionaire, the Aldens are eager to help him crack the code. If Sam can solve the puzzle in time, he will inherit the millionaire's money!

The Aldens find a castaway on a South Sea island. How did he get there and who is he?

The old abandoned school in Silver City is being fixed up as an art center and the Boxcar Children volunteer to help clean up the place. But the other volunteers are scared by the spooky goings-on in the school—doors lock by themselves, and chalkboard messages appear out of nowhere! Will the Aldens find out the secret of the haunted school?

Summer vacation on an almost private island gives the Aldens a challenge.

The Aldens help to blaze a new trail on Blizzard Mountain where rumors tell of buried treasure. But something strange is going on--supplies go missing, strange noises are heard in the woods, and a member of their group disappears!

The Aldens agree to help Grandfather's friend fix up Skeleton Point, an old mansion. Skeleton Point is filled with old skeletons belonging to its former owner, and townspeople have seen the skeletons walking through the house.

Renting a lighthouse is unusual, but even more so is an unfriendly boy's peculiar behavior.

A big Hollywood agent wants Watch to appear in a commercial for a new kind of dog food! Even though Watch seems to love the food on-camera, he won't touch it at home. Someone at the studio has been switching the brand and the Aldens must find out the truth behind the cover-up. Should Watch still do the commercial even though he doesn't like the product?

The Aldens are visiting Grandfather's good friend, Mrs. Wade, in a small town called Elbow Bend. According to Mrs. Wade's granddaughter, the town has many ghost tales and there is a favorite tale concerning a dog.

Eccentric Aunt Jane needs help on her ranch. The Aldens overturn a plot against her.

From a high perch Benny discovers a clue to a hidden room with contents that surprise everyone.

It's a big week at Cogwheel Stadium—the baseball team the Clayton Cogs are playing for the pennant! The Aldens are helping out at the ballpark, and they're glad to be part of the excitement. But the other team's batters seem to know the pitches too well, and it's clear someone in the stadium is...

The Aldens are on vacation in Seattle! On their first day of sightseeing, they start the day at the Hungry Heart Diner where a mystery falls right into their laps! Benny finds a riddle taped to the bottom of their table.