Buffy Silverman 
How Do Big Rigs Work? [PDF ebook] 

Big rigs have powerful engines and lots of wheels. But do you know how much weight these trucks can pull? Or how drivers stop these giant vehicles? Young readers will love this in-depth yet accessible look at big rigs. Learn how they work, the special equipment they need, and the cool features and uses they have. From their tires to their roaring engines and loud horns, this book contains all the details that will excite big-rig fans!