Ernesto Girondo is Profesor Titular de Geometria y Topologia in the Department of Mathematics at Universidad Autonoma de Madrid. Gabino Gonzalez-Diez is Catedratico de Geometria y Topologia in the Department of Mathematics at Universidad Autonoma de Madrid.
Overall the text is very well written and easy to follow, partly due to the abundance of good concrete examples in every single section illustrating concepts from the very basic to the very technical. Aaron D. Wootton, Mathematical Reviews