Tree house mystery

Gertrude Chandler Warner was an American author, mainly of children's stories. She was most famous for writing the original book of The Boxcar Children and for the next eighteen books in the series. Warner once said that she did much of her writing while convalescing from illnesses or accidents, and that she conceived the idea of The Boxcar Children while sick at home. Of this, she said, "I had to stay at home from school because of an attack of bronchitis. Having written a series of eight books to order for a religious organization, I decided to write a book just to suit myself. What would I like to do? Well, I would like to live in a freight car, or a caboose. I would hang my wash out on the little back piazza and cook my stew on the little rusty stove found in the caboose."