I don't do a lot of product reviews, but this thing is awesome. I heard about it on my favorite PodCast "The Eye of Horus Podcast". Check out the book and check them out.
From building bases, plaster work, plastic part construction, weathering, foliage construction, water effects and everything else in between. It is 556 pages of full color techniques. It is pricey, runs about 100 bucks, but considering the Forge World ones are a 1/4 the content for half the price, well worth it. I found it in Amazon prime and had it in 2 days.