I just purchased the "Interstellarum Deep Sky Guide Desk Edition - Spiral-bound " from Amazon.ca yesterday (11th July 2019 ) for Just $45.22 CDN !!!!!! that`s a 61% off the of the regular price of $114.95 CDN.
Today 12 July 2019 it is $52.16CDN a 55% off the list price $114.95 CDN
Amazon LINK SO.. get one fast before it goes up again !!
Here is the CN Review HERE