I wouldn't use a book like this for foundational learning. It's more a precis of existing information on a topic. Looking at one of the entries for Numerical Weather Forecasting, it presupposes at least a solidly-established understanding in Applied Math or Math Physics. If you're approaching that topic without a basic knowledge of what a divergence is, what vorticity is, what a gravity wave is, or the difference between implicit and explicit FD equations, etc. it's probably not going to teach you much. But, if you do have the background it's a great resource - a really super resource. It's a bit like Wikipedia, I suppose. Super helpful at some level, but not at others.
