Book and well designed with beautiful pictures of example, but I admit that I was surprised and rather annoyed to see that many "projects" involve DIY ... and I'm not really handy! .. . Thus, 16 projects (transforming a Holga 120N housing), 17 (photo TTV), 20 (recovery targets) 23 (toggle objective), 24 (digital pinhole), 33 (portable flash diffuser) 36 ( mobile ring flash) 37 (mobile beauty bowl) 38 (long light box) 39 (ring flash studio) 40 (broadcast studio box) involve a lot of tinkering with the idea that readers want to spend hours making this kind of accessories are available to them to recycle old targets and other extension tubes, filters, etc.
In short, without doubt interesting ideas, but plan to spend time away from the housing for full cutting and gluing, and a small budget to fit you various things if you're a new digital camera owner ...