The setting is on Dirt Bike tracks and the main characters are all the dirt bikers." Dirt Bikes" is a book about all the dirt bikes including old , modern , and new dirt bikes.
Old Dirt Bike
These older Dirt Bikes are not very good on bumpy roads . They also aren't very fast.
Modern Dirt Bike
Modern dirt bikes are pretty quick and they handle well on dirt and bumpy roads.
New Dirt Bike
Newer dirt bikes are very fast and can handle well on dirt trails but are mainly made for smooth dirt races not on off road courses.
The book begins to tell you about old dirtbikes and dirt bike races. Then it tells you about all the dirt bike parts and offroad races. lastly it tells you about modern dirtbikes and modern dirtbike challenges and competitions .It also tells you about modern bike parts and all the cool tricks they are able to do .