
The Secret of the Strawbridge Place by Helen Pierce Jacob, 1976.
This story takes place in Ashtabula, Ohio during the Great Depression. Kate is frightened of the hobos who pass through town looking for work, but at the beginning of summer, her brother Josh dares her to come with him to spy on the hobo camp. The two of them witness a fight between three hobos, and in their haste to get away, Kate falls and breaks her arm. At first, she is sure that her summer is ruined, but when she considers the place where she fell, she realizes that she has stumbled on an important clue to a secret surrounding the old house where they live.
Locals say that during the Civil War, the Strawbridge family, who lived in the house before Kate’s family, were part of the Underground Railroad, hiding runaway slaves. However, no one has ever been able to find the place where the slaves were hidden. When Kate fell, she discovered the opening to a cave near the river that she never knew was there before.
Oscar, a boy visiting his grandfather nearby, becomes Kate’s friend. Since he was also injured in one of Josh’s escapades (having broken his leg when the kids were fooling around in the haymow), she invites him to join her in the search for the secret. They form a partnership called Cripples Incorporated and have fun inventing code words and writing secret messages about what they’ve discovered. Pursuing the secret comes with some risks, and before Kate can discover the whole truth about Strawbridge Place, she has a serious brush with danger.
It’s an interesting mystery that invites readers to try to figure out the clues along with Kate and Oscar as they ponder the sampler with the strange motto left behind by the Strawbridge twins. Oscar also introduces Kate to Sherlock Holmes stories, one of which provides her with the inspiration to solve the mystery. Kate also develops better feelings for the hobos, who, like the runaway slaves, turn out to be mostly ordinary people just looking for a better life.
The book is available to borrow and read for free online through Internet Archive. There is also a prequel book that focuses on the original adventures of the Strawbridge family when the house was operating as a stop on the Underground Railroad called The Diary of the Strawbridge Place.

Meg’s Uncle Hal takes her and her best friend, Kerry, with him on vacation to Merrybones, Maine. He has a cabin there, and it’s a good place to go fishing or exploring in the woods. However, Uncle Hal isn’t just there to relax this time. His friend, Emily Hawthorne, has asked for his help because she’s received some mysterious, disturbing messages.
She has returned to Merrybones to teach in the local school, but people in this town look at her as an outsider because she has spent so many years away. Now, she has received threatening messages written in rhyme and signed with a star with the number 13 inside. Her pet black cat, Melissa, has also mysteriously disappeared, and Emily is worried about her.




Mystery of the Roman Ransom by Henry Winterfeld, 1971.
When they return to the slave dealer’s home, he is gone, and the place is boarded up. An elderly slave who was left behind said that all of the other slaves were sold, and then the dealer simply fled, abandoning him. He also says that there was someone else who had come to see the dealer, demanding that he hand over the slave called Udo (the one that the boys had already bought). This man was a former gladiator with only one eye, and he was very angry that Udo was gone. He swore that he would he would get Udo one way or another, dead or alive. He threatened the dealer, saying that he would return later and kill the dealer and all of his slaves if Udo was not among them then. The slave dealer, not knowing the names of the boys who had bought Udo or where he could be found and therefore unable to get Udo back, fled in fear of the former gladiator’s threats.
Journey to America by Sonia Levitin, 1970.
But, getting on the train out of Germany is only the first step of their long journey. Lisa and her mother and sisters live as refugees in Switzerland, waiting for her father to help arrange for their passage to America. Often, they have too little to eat because they don’t have much money. There are some people who help them, and they make some new friends, but the long wait is difficult. Meanwhile, they must face the frightening events taking shape around them, around the people they left behind, and their own uncertain future.
Soup by Robert Newton Peck, 1974.
Some of the stories are laugh-out-loud funny, and some of them have kind of a moral lesson to them, like the time when Rob realized that he didn’t have the heart to lie to his mother even if it would allow him to escape punishment for talking back to the school nurse, the time when Soup and Rob tried to cheat Mr. Diskin out of some money so they would have enough to go to the movies but ended up feeling guilty, and how the boys made themselves sick by attempting to smoke cornsilk. Others are just stories of childhood events and friendship, like the story of how Rob and Soup played football and how Soup loaned Rob his new shoes when his were ruined. Even though Soup often got Rob into trouble, he really was a good friend and went out of his way to make Rob feel better when he needed it the most.
Pirate Island Adventure by Peggy Parish, 1975.
The Haunted House by Peggy Parish, 1971.
The Great and Terrible Quest by Margaret Lovett, 1970.