Any of the sartorial advice in "Casual Power" could be dispensed in 15-minutes by any half-sentient clothing sales person. If not, find another place to shop.
The chapter on men's suits should be ripped out and burned. Or better yet, published as a guide to everything wrong and inaccurate about tailoring and style. Flat front pants are casual? Perhaps, if you think Banana Republic invented the style. You can't get any more traditional -- just ask a Savile Row tailor to make you a pair of trousers with triple reverse pleats! Only old men and little boys wear pants with no cuffs? Sorry, but quite the opposite, and ironically, you should probably never cuff a pair flat front pants. And not even Joan Rivers can help you if you cuff tux pants.
But I think my favorite bit of tripe sums everything up nicely -- (paraphrasing here) "The sleeves of modern jackets should be worn lower on the wrist to complement the length of today's longer coats." Oh for pete's sake, Sherry! Unless you have adjustable arms, your suit cuff should fall right to your wrist joint, and leave about 1/2" of the shirt cuff showing. If it doesn't, tailor the coat or find shirts that fit. This is a rule carved on the hallowed streets of London and Milan, and it doesn't matter if we're talking about a stuffy Oxxford chalkstripe or some mylar number by Helmut Lang. If this is "Casual Power's" advice on suits, imagine what other undiscovered horrors lie waiting within it's pages. Shudder to think.
The only decent bit of advice in "Casual Power" is to get rid of about 90% of what you already own and think looks good and start over. Amen. Beyond that, the nice photographs of a wide range of good-looking outfits are somewhat redeeming. But again, go look in shop windows, or find a well-dressed clerk at Nordstrom and ask for their help. Or buy a copy of Esquire or W. Any style put in print is history before the ink dries. If not, it's so basic and traditional your parents probably taught you this stuff before your first date.
You still have to have a book on clothes and style? Every man should read Alan Flusser's book or Esquire's very tongue-in-cheek guide. Take both with a grain of salt, however. Women - forget it. Too trendy. Stick to the mags.