Helen of Troy: Goddess, Princess, Whore
Book
As soon as men began to write, they made Helen of Troy their subject; for close on three thousand...
Basic Helicopter Aerodynamics
John M. Seddon, Simon Newman and S. Newman
Book
Provides an account from first principles of the aerodynamics of helicopter flight, avoiding the...
The Helm Guide to Bird Identification
Alan Harris and Keith Vinicombe
Book
This book covers difficult identification issues by looking at tricky species pairs or groups of...
When Your Child is Sick: What You Can Do to Help
Alf Nicholson and Grainne O'Malley
Book
As a parent, you play a central role in managing your child's wellbeing. When Your Child Is Sick...
iMathematics™ - Math Helper and Solver
Education and Utilities
App
iMathematics is your personal math tutor. It is used by thousands of students every day, and it’s...