Bicycles are relatively simple machines. They might only consist of two wheels, two pedals, gears, a seat and a set of handlebars, but when they break down mid ride you might still be left scratching your head about what went wrong. Rather than trying to deal with 3g service (or lack thereof) for Google, or the technical manuals for your bike (assuming it’s not custom), try The Bike Owner’s Handbook. The book details everything you need to know about basic repairs and maintenance (tire changes, brake and gear adjustments, proper cleaning, etc.) using simple, easy to understand drawings and black-and-white photographs. Plus, since it’s only 6.7″ x 5.2″ x 0.4″ it’s easy enough to throw in your bag and take with you on the go.