Amazon.com description: Product Description: The Happy Hollisters and the Secret Fort (#9 in the Happy Hollisters series) A missing letter is the key to the whereabouts of Fort Freedom, the stockade that disappeared after the Revolutionary War. The fort is located somewhere within the boundaries of Shoreham and has been sought after for many years, not only for its historic value, but for the gold supposed to be hidden there by the early settlers. The Pine Lake Parkway construction job brings this unusual disappearance to public notice and, of course, wherever there is a mystery the Happy Hollisters are sure to be in the thick of it. And “thick” is just the right word, for it is hoped that the fort will be uncovered by the great bulldozers and steam shovels that are building the new Parkway. With dust and dirt flying and houses being torn down the Hollister children search the area for some clue that will lead them to the missing letter, the site of Fort Freedom, or both. Here is a fast-moving Hollister mystery that offers exciting adventure with narrow escapes from the dangers of the construction area and the false trail laid for the children by a man whose identity remains as much of a secret as the location of Fort Freedom. First published in 1955, this charming mystery-adventure story, faithfully reproduced, is now available in paperback and eBook for the first time! Written for boys and girls between the ages of six and twelve, The Happy Hollisters are wholesome books, with an accent on humor and good, clean fun. Integrity always pays off and right wins over wrong. Parents, grandparents, and teachers love these books for their healthy celebration of life in simpler times. Kids are thrilled with the fast-paced action and will not want to put them down. The action-packed illustrations make the story – and the Hollister family – so vivid that the reader has a feeling of really sharing in on the adventures of this lovable and interesting family.