On the trail of their father's killers, the Hardy Boys uncover a new piece of evidence: Fenton Hardy may be alive after all. Third in the Phoenix Operation seri

The first of five books in the groundbreaking new series The Human Equation Toolkit. Mime Wayne Constantineau and scholar Eric McLuhan explore the four possible

Exceptionally clear exposition of an important mathematical discipline and its applications to sociology, economics, and psychology. Topics include calculus of

This two-part treatment explains basic theory and details, including oscillatory solutions, intervals of stability and instability, discriminants, and coexisten