This book is certainly among the better opening surveys I've read. Though the sections on the modern line (4 Nf3) get a little tedious, understanding the underlying strategies developed by Kengis and Larsen are essential to playing this defense against a prepared e4 player. As soon as the book departs from these difficult responses Taylor lightens up considerably. I even laughed out loud a few times. He's a great writer to spend time with and this book is a solid introduction to a daring defense.