Sandi really distills knowledge well. I haven't bought this book yet, but after reading POODR, I'd take 20 pages from her over 100 from another author. I think it's easily worth $50, but I realize we're in an age where we're used to $19 ebooks. Again, I'd pay $100 for her material over somebody else's $19 book. (Not compensated or anything, just a fan of not wasting my time and of awesome materials that help me accomplish that goal)