In the far future, humanity is caught in an endless war against an alien menace. The struggle is dominated by giant war machines called Gear. Only the best and the brightest are allowed to drive these war machines. The process of elimination begins in junior high. Teresa Gottlieb is a thirteen-year-old freshman at the most prestigious military academy in the world. A little while ago she saved the school from an alien attack, but at Gear School "a little while ago" is ancient history. Her status as savior of the school isn't cutting her any slack with her teachers, her classmates, or the clique that runs the school. Now Teresa finds herself caught up in an adventure that has more at stake than the future of the school or even the fate of the planet. It could jeopardize her budding first love!

"Based on the Xbox 360 video game series from Epic Games/Microsoft Game Studios."

This book provides comprehensive information for various planetary gear trains, with practical applications and comprehensive references to technical articles. In the text's chapters, readers can find all the information needed for various types of gear trains, with illustrations and examples. The authors help gear designers to creatively understand the design of gears, as well as master the mechanical calculations needed. Planetary Gear Trains is the most comprehensive and up-to-date work available in this key technical area. The book reflects not only teaching, but also the practical experience of the authors. It was developed under the motto "From practice to practice".

For more than 30 years the book Practical Gear Design, later re-titled Handbook of Practical Gear Design, has been the leading engineering guide and reference on the subject. It is now available again in its most recent edition. The book is a detailed, practical guide and reference to gear technology. The design of all types of gears is covered, from those for small mechanisms to large industrial applications. The presentation is designed for easy reference for those involved in practical gear design, manufacture, applications and problem solving. The text is well illustrated with clear diagrams and photographs. The many tables provide needed reference data in convenient form.

" ... offer[s] a challenging exploration of problem solving mathematics and preparation for programs such as MATHCOUNTS and the American Mathematics Competition."--Back cover