I just bought most of a magic collection last weekend. This book was part of the collection. I know this was a prospectus of Will Golstons larger "locking" books. This is more a paper phamplet, and as you can see the cover is in bad shape. I am considering selling this as I am not a book collector, however I can not find history of this book, value, etc anywhere online.
Hoping someone out there is a book expert and can help put a value on this.....
Otherwise it might go to an auction site...

Click here to view attached image.