Thanks for this information.
This book was very popular and that's not good for collectors. It currently retails for $1 - $5. Similarly, Hoover was generous with his signature - I even have one on a photo.
If your book is in great condition, its current retail (replacement or insurance) value is approximately $200. If you were to sell it, you could expect to get the fair market (private sale or auction) value of approximately 40% of the retail amount, or $80, depending on location and actual condition.
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