Richard Marmo is publishing a series of ebooks under the name of “The Marmo Modelbulding Guide Series”. This is the 3rd installment of the series. These ebooks are available in epub, .mobi and/or .pdf format, based on your preferences.
I have read this guide regarding to model math and scale jumping and honestly, I think there is good information on it, but the way it is presented makes it a bit difficult to follow.
The book mainly deals on how to convert scale drawings from one given scale to a different one. This book includes the “Marmo’s Three Laws”. While the name of them is grandiose, they are accurate from a mathematical point of view and helpful to avoid common mistakes.