Journey into geometries

Marta Sved, H. S. M. Coxeter, John Stillwell0883855003, 9780883855003

This charming book introduces us to topics in hyperbolic geometry in a delightfully informal style.
Journey into Geometrics can be read at two levels. It can be studied as an informal introduction to post-Euclidean geometry, or it can serve as background material for university students. The material presented in the text is extended by carefully selected problems. The background required is minimal, standard high school geometry, yet the serious student, aided by problems attached to each chapter, should acquire a deeper understanding of the subject.