A mystery story tests readers' imaginations while providing insight into the world of police detectives.

This is one in a series of KnowHow activity books aimed at children between the ages of seven and twelve. Other books in the series offer ideas on experiments, paper fun, detection, jokes & tricks, and action toys.

In this tightly plotted debut novel, an unlikely detective, armed only with an umbrella and a singular handbook, must untangle a string of crimes committed in and through people's dreams.

Workbook for training detector dogs of all types, with an easy to follow illustrated format. Trouble shooting and ProTip sections included.

Kids fascinated by crime and police work will appreciate this inside look at detection and forensic science. The 25 experiments can be performed at home and offer fascinating explanations of police lab techniques.

Written by an expert in the game industry, Christer Ericson's new book is a comprehensive guide to the components of efficient real-time collision detection systems. The book provides the tools and know-how needed to implement industrial-strength collision detection for the highly detailed dynamic environments of applications such as 3D games, virtual reality applications, and physical simulators. Of the many topics covered, a key focus is on spatial and object partitioning through a wide variety of grids, trees, and sorting methods. The author also presents a large collection of intersection and distance tests for both simple and complex geometric shapes. Sections on vector and matrix algebra provide the background for advanced topics such as Voronoi regions, Minkowski sums, and linear and quadratic programming. Of utmost importance to programmers but rarely discussed in this much detail in other books are the chapters covering numerical and geometric robustness, both essential topics for collision detection systems. Also unique are the chapters discussing how graphics hardware can assist in collision detection computations and on advanced optimization for modern computer architectures. All in all, this comprehensive book will become the industry standard for years to come.