This book delivers exactly what it promises - an introduction. It won't make you a top-notch-on-the-cover-of-sky-and-telescope kind of photographer over night. But it certainly will give you the tools to get started and/or get better.
What's really great about this book is that it acknowledges the fact that most newcomers to astrophotography are either amateur photographers OR amateur astronomers. To become a decent AstroPhotographer you will need to know both fields. And so the book starts out with an introduction to basic astronomy. Also the book outlines the general concepts of cameras and telescopes.
The book is also stuffed with nice images, tables of exposure times and f-stops, film types etc.
And now you will have to excuse my. Gotta go outside and get on with the imaging.