Gertrude Chandler Warner
At the beach, Benny finds a valuable gold locket and decides to try to find its owner. Soon the children are caught up in a puzzle involving strange visitors at the beach and the mysterious Miss Smith,...
Henry, Jessie, Violet, and Benny once lived on their own in a boxcar... The Boxcar Children are spending the summer in a tiny, quiet New England fishing village. The little schoolhouse doesn't have a proper teacher, so the Aldens are teaching! There's also a very old library where nobody ever goes — nobody, that is, except for a mysterious stranger. For such a small town, Port Elizabeth has a lot of secrets! Look for more Boxcar Children
...The Aldens have found a mystery under their very own roof! When the children found an old journal behind the closet wall in the guest room, they never dreamed it would lead them on a search for valuable coins. What happened to the girl who wrote the journal — and what is she trying to tell them?
14) Caboose mystery
The Aldens are going with grandfather to visit his friend, old Cap Lambert, a retired riverboat pilot who lives in a cabin in the woods. To get there, the Boxcar Children take a wonderful trip down the Mississippi in a paddlewheel boat. But when they arrive at Cap Lambert's cabin, they find some mysterious things are going on. Spooky phone calls, eerie flickering lights, strange dark figures. Is the cabin haunted?
The Aldens are helping save an old library that's about to be torn down. If they fix it up, it might be given landmark status! But after all their hard work, it's very clear someone is trying to destroy the library. But who?
Grandfather is taking the Aldens on a camping trip. The children enjoy the camp-out — setting up the tent, hiking in the woods, and especially making delicious food over the campfire. But some strange things begin to happen. Loud music plays in the middle of the night. Their lantern disappears. And then they receive a frightening note. It looks like the Boxcar Children have another mystery to solve!