You will benefit (or not) from this book depending on what type of screen printing you are looking to do. First and foremost this is centered on fine art prints. This is what I was searching for and still found this to be a major disappointment.
Up to page 19 covers the author's printing collaborations with other artists. No technical information.
Page 21-41 covers using the screen to make monotype prints. As the name suggests, monotypes are one-off prints, more akin to original paintings than longer print runs. I am personally more interested in producing 100 of the same print rather than a unique, one-of-a-kind artwork.
Pages 43-71 cover the subject of creating stencils with the emphasis on hand drawn or hand cut stencils. I was more interested in photo mechanical stencils, not having to hand paint or draw a stencil.
Pages 74-75 show how to coat screen with emulsion. Useful, but you can find even better videos on the internet. Pages 76-81 cover exposure and again, the information can be found in a much clearer format in videos online. Page 82 is washing the screen. Page 83 is touching up the screen.
Chapter 5 is about color mixing.
Chapter 6 is "Printing Screenprints" and covers screenprinting tables, drying racks, squeegees, paper, up to cleaning the screen and removing emulsion. Again, pretty basic material.
Chapter 7 "Computer Techniques" pages 119-140 covers basic photoshop techniques. If you've never used photoshop this might be helpful, but I would think a dedicated photoshop book would be more useful.
I was mainly looking for a book geared to photomechanical type screen printing, in larger runs similar to an Andy Warhol style print. This book was more focused toward free-form, hand drawn methods of screen printing. While the techniques and materials used were interesting, it's not what I was looking for.