(Another) Book to get at some Point - "The Art of Intelligence"

I have heard Dr Mason speak several times and I have always been impressed and he is a co-author of this book (see below, he is very interested in hybrid warfare which is a fascinating subject) : 

https://rowman.com/ISBN/9781538123478/The-Art-of-Intelligence-More-Simulations-Exercises-and-Games

No space on my bookshelf so I might have to go the eBook route.