501 Spanish verbs was bought for my father as he has moved to Marbella in march and started spanish lessons there. He tells me the book is absolutely brilliant. It has a verb per page with all its versions and uses,90 pages of exercises and answers,a c/d rom for the p.c. or lap top and even an audio c.d. to play and listen to as well. So in one form or another he uses EVERY day. Also ordering took 7 (SEVEN) days from start to delivery (including christmas eve and christmas day) all at a fantastic price. Thanks AMAZON. KEEP UP THE GOOD WORK!