More of what a lathe can do. Less about how to do it.
By the title and cover images I thought that the book would be more instructional than I found it to be. There are a lot of nice images of impressive works by miniature-lathe-made projects by fine craftsman, touting of possibilities, etc., but not much in the how-to department. And while the author seems like a real craftsman, inventor, and businessperson, there's not a lot of useful information for those wanting to actually start turning material and learning real-world use of the miniature lathe.
Not terrible, nice images, but not particularly useful, IMHO.
I would saying this is a good book for someone who has no machining knowledge to get information to help them get started. It covers information from lathe and mills to anodizing and heat treating even gears and thread cutting. It is a great resource for any home hobby machinist or want a be machinist. It does focus on the Sherline products but can be useful to anyone with a small mill or lathe.
I would say the Content is "compelling" but to only those interested in home machining.