This is an excellent source of thoughtful photographic anecdotes, some stories and a bunch of assignments of many thought-provoking types.
No matter what level of photography you operate at, analog or digital, professional or not, I believe you'll benefit from this excellent sourcebook. You simply pick and choose the ones you want to take a shot at. It's not a novel. You don't need to read it cover to cover one chapter after the previous chapter. I read various assignments at random, thought about them, made a few notes and when I was off shooting on my own, reviewed my notes and thoughts to expand on the assignments and created some interesting results.
Some people here have questioned the fact this work doesn't contain photos. It doesn't need to nor do I suspect it was ever supposed to. Simply stated, it doesn't lead by example but rather stimulates your artistic curiosity, urging you to think about the assignments the contributors offer in short, concise form;. To embellish them or not is up to the reader and then go on to craft your own photographs. You learn by your own examples and critiquing your own work, deciding what YOU like and don't like about a particular photograph of yours.
You can do that individually or perhaps in small groups. Photography afterall, is an intensely personal pursuit. While it's not uncommon for some to try and duplicate someone elses work that you liked, all you learn from that experience is how to duplicate rather than producing original work. And while that's certainly appropriate in learning things like lighting, it doesn't help you grow in terms of conceptualization.
The suggestions used to spark creativity and conceptualization here are diverse and I found also quite interesting. I also enjoyed mulling them over in my off hours. It's a nice portable and fun piece of work, one I highly recommend. I've been in this business for 37 years. If you've gotten into a creative rut it will help liberate you. If you're not, it will still help expand your photographic horizons, maybe see things better and liberate your creativity in ways that you've perhaps never thought of. It also doesn't try and sell you anything. To me, those qualities are priceless and well-worth the $20 bucks. It also gives you the opportunity to support Aperture.