This book has been in print for 30 years. Resoundingly popular, it still serves its purpose exceedingly well. But mathematics education has changed considerably... » 

This book has been in print for 30 years. Resoundingly popular, it still serves its purpose exceedingly well. But mathematics education has changed considerably since 1973, when theory took precedence over examples, and the time has come to bring this presentation in line with more modern approaches. So therefore the material has been reorganized while the substance of the book remains the same. «