A nuts-and-bolts-and-brakes-and-chains-and-pedals-and-tires-and-just-about-every-little-thing-that-makes a-bike manual. It's very basic, designed to instruct the cyclist in good riding and maintenance habits. There are numerous do's and don'ts -- do obey the law, don't horse around, do watch out for broken glass and nails and dogs with sharp teeth, don't jump the curb, do avoid potholes, don't speed or tailgate, do listen for oncoming cars when on narrow country roads (""Farmers are wild drivers. They usually shoot right down the middle""), don't overdo it (""Overexertion destroys tissue""), do wear cotton underclothing on long trips. The maintenance section is equally fundamental. Fundamental jargonese. Alth believes (we don't) that most repairs and part replacements ""can be accomplished by anyone taking the trouble to think a little"" and he speaks knowingly of the spanner required for work on the bearing cones (""assuming you do not have quick-release hubs"" -- huh?) and other members of the wrench family, always remembering of course that ""If you have a cotterless crank, you will need a special removal tool. See Chapter 10, on pedals and cranks, for details."" Whereupon we find that a ""cotterless crank requires a cotterless crank-removal tool. See Chapter 6, on repairs."" How's that again? Not for the cosmic rider.