This is a very basic book, but then again, hunting rabbits doesn't require a PhD. However, the book does serve a number of good purposes:
1) For the 'prepper who has never gone hunting, the book gives a very good overview of the art.
2) In countries or in some locales within countries, firearms are illegal or heavily controlled. Air guns are usually considered in a different light than firearms, yet because of their limited range and effectiveness at penetration, the hunter is required to be closer to the prey.
I would encourage the authors to consider a future book expanded to also include slingshots (called catapults in some countries) and the use of simple snares.
(review of free book)