So I've had the chance to attempt to try to make some of the jigs, and I have to say this book is garbage.
The jig I tried to make was a planing sled. Quite common, but the book left out several critical things.
First off? The book calls for using a single sheet of acrylic or plywood, but on a longer sled or with a heavier router, this will bow. Best thing is to reinforce the sides of the sled to keep it stiff, but no mention is made of this
Second off? When planing using said sled, actually positioning the workpiece is tricky. I'm currently engaged in some trial and error, as well as some research on the internet.
I feel that if the book does not cover these critical tasks, and requires me to check each recipe on the internet, it's worthless. I am therefore demoting it to 1 star.
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This book is OK.
Essentially it's a cookbook with "recipes" in the form of jigs and other things you can do to address specific tasks with your router.
And, while there are a number of jigs, and you'll probably find useful ones, a lot won't be useful -- and you won't learn anything about routers themselves.