To really improve your riding, you really need to spend a lot of time on the bike. However, if you're spending a lot of time on the bike and still don't know what you're doing, you could just be endangering yourself. While a motorcycle safety course is the best way to improve skills, books can also really help.
In a previous post, I discussed books that can help spur your adventurous spirit and get you out on the road. While these books are great, they won't help improve your riding much. The following books will actually help you become a better rider.
Proficient Motorcycling: The Ultimate Guide to Riding Well
Author David L. Hough is a well-known motorcyclist and author and puts his skills to go use in this book. It will teach you basically everything you need to know. The title really says it all. You will learn a lot reading this book, so sit back brew a cup of coffee and learn up.
Mastering the Ride: More Proficient Motorcycling
Read David L. Hough's first book? Step it up a notch and read this step two to motorcycling proficiency. You won't regret spending the money. This book goes beyond the basics and can really turn you into a pro. Still, you have to practice the stuff in the book to get really good.
Twist of the Wrist: The Motorcycle Roadracers Handbook
If you're looking for something that both covers the basics and goes a little further, this is the book for you. It's highly rated and will teach you everything you need to know no matter if you ride a sportbike, cruiser or standard motorcycle.