The Tower Treasure (The Hardy Boys #Volume 1)

The Tower Treasure (Vol. #1) (1927) / ISBN: 9781557091444 / 9780448089010 / [ASIN: ‎ B00005WZJY ] / [B00L0SIMCO ] '-' A dying criminal confesses that his loot has been secreted ""in the tower."" Both towers of the looted mansion are searched in vain. It remains for the Hardy boys to make an astonishing discovery that clears up the mystery.
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https://en.wikipedia.org/wiki/List_of_Hardy_Boys_books#stories
https://en.wikipedia.org/wiki/The_Tower_Treasure
'(...) The Tower Treasure is the first volume in the original The Hardy Boys Mystery Stories published by Grosset & Dunlap. This book is one of the "Original 10", generally considered by historians and critics of children's literature to be the best examples of all the Hardy Boys, and Stratemeyer Syndicate, writing. This book was written for the Stratemeyer Syndicate by Leslie McFarlane in 1927....
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[About the Author]: Franklin W. Dixon was the pseudonym devised by Edward Stratemeyer for the author of a series of mystery books he was developing which became the Hardy Boys series. The first book, The Tower Treasure, originally published in 1927, was ghostwritten by Leslie MacFarlane who went on to write 19 more, including #2 through #16. In all, there are 58 titles in the original Hardy Boys Mysteries series published between 1927 and 1979 written by 17 different men and women. Many of the books were later revised, adding another four Hardy Boys Mystery Stories to the total.

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