Nieves Garcia Fernandez and Jesus Sanchez Lobato. Espanol 2000 Nivel Medio 1-10

This book is published in Spain and written entirely in Spanish. This is good, as total immersion is the best way to master a langauge. It is grammar and excercise based and provides a solid foundation in the structure of the language. Some may find this too dry and would do well to combine this course with Michel Thomas's approach. However, to really master a language, it is worth studying it on the dry, grammatical level as you'll feel much more confident in forming your own sentences on the fly. This books helps you to do this well. Part 1 (1-10).