#3 Mandie and the Ghost Bandits by Lois Gladys Leppard, 1984.
Mandie and her family are going to proceed with the plan to create a hospital for the Cherokees with the gold that they found in the cave. To do that, they need to take the gold to a bank in Asheville. They decide to take the gold secretly on a train. Uncle Ned stays in the baggage car to watch the gold as they set out on their journey.
When the kids decide to leave their car to go visit him, strange things begin to happen. They see riders dressed as ghosts out the window. Then, the car with Uncle Ned and the gold inside is disconnected from the rest of the train, crashing into a ravine. The train comes to a stop, and the kids jump off to see if they can help Uncle Ned.
Before they can find him, the train starts up again, leaving them behind, and they are taken prisoner by the mysterious ghost bandits. They are after the gold in the baggage car, but how did they know it was there when Mandie’s family tried so hard to keep it a secret? Mandie and her friends must escape and find the others before it is too late!
In some respects, I would call this more of an adventure story than a mystery, although there is still the question of how the bandits knew where the gold was in order to steal it.
The book is currently available online through Internet Archive.
#3 The Gatehouse Mystery by Julie Campbell, 1951.
The Mystery Hideout by Ken Follett, 1976.
But, Izzie turns out to be a good friend for Mick. They both love to play soccer, and Izzie tells Mick that his father used to work in the old studio buildings that they’re tearing down to build the new hotel. In fact, Izzie even knows a secret way in, so the boys sneak in to explore a little. They’re goofing off with some of the props when they make the startling discovery that the prop guns are loaded with real bullets! Then, the boys have to make a run for it because there are other people sneaking around the old studios. What is going on there?
The Mystery in Dracula’s Castle by Vic Crume, 1973.
Alfie is an aspiring film maker. Specifically, he wants to make horror movies, and he talks his younger brother into playing the part of Dracula in his latest Super 8 film. Leonard is only a reluctant vampire because he doesn’t like horror movies. He really wants to be a detective, like Sherlock Holmes. Back home, he and his brother saw police investigating the scene of a robbery at a jewelry store, and he’s decided that he wants to investigate crimes like that. Soon after they arrive at the beach house, Leonard adopts a stray dog and names him Watson so that he can be his sidekick.