Gertrude Warner: 149 books

The Alden children are visiting a gem mine that is holding its annual gem-hunting competition. It's not long before Jessie makes a fabulous find. But just when she's about to win the contest for finding the biggest ruby, her gem disappears!

Benny's curiosity, while staying in a fishing village, leads to capturing a swindler.

The Aldens are spending a week at a rescue ranch that takes in horses whose owners can no longer care for them. The children help with chores, and Jessie looks after a horse named Dragon. But soon two of the oldest horses are missing from the pasture.

The Alden children are searching for a rare comic book of their favorite superhero, Captain Fantastic. They finally find the comic and something else, too--a strange note inside, "signed" by the comic's creator. The Aldens realize the note is a fake.

The Aldens enjoy playing their favorite computer game, Ringmaster. They get a chance to "test out" Ringmaster II before it's released to the public. But strange things happen when they begin to play the game.

Someone is causing trouble for the Boxcar Chidren's soccer league.

When the Boxcar Children visit a neighbor’s house, a mysterious old wedding photo and a riddle lead them on a “spy game” devised long ago by the original owner of the house. When the children hunt for clues they discover amazing things, like a stone path whose pieces fit together into a jigsaw...

Grandfather and the children are visiting Broken Moon Pond, where Grandfather used to vacation as a child. The children are enchanted by the beautiful wilderness. But they soon encounter a strange set of coincidences, mishaps, and mysteries.

Grandfather is taking everyone on a special holiday trip to an old-fashioned New England inn. The Aldens have fun playing in the snow, ice-skating and working puzzles. Then suddenly they become part of a very special puzzle.

The Aldens get to be in a documentary about the Alamo—if the film gets made.

The Boxcar Children are going to summer camp and are looking forward to a week of new friends, exciting activities, and, most of all, the annual camp Olympics. As soon as camp begins, everything begins to go wrong for the Aldens—they lose their luggage, the camp flag disappears from Henry's cabin,...

When the Aldens visit friends in Vermont, they're in for a teddy treat--the annual Bear Jamboree, celebrating toy bears from all over the world! The Aldens soon encounter an unbearable mystery: a very rare and valuable bear has disappeared.

The Aldens are spending spring break on a beach, but they aren't just soaking up the sun. They're protecting an endangered species! Their job is to mark sea turtle nests so the eggs can be moved to a safe place to hatch, but someone is digging up the eggs without permission. Can the Boxcar Children figure out what's going on and help save the sea turtles?

The children run into trouble when they begin working at Hope Harbor Mall.