Handicapping Book

[fmc123412]

I was looking for a handicapping book to buy and i want to know if you can help me find the right one.

To the facts:

- I bet on horses on a weekly basis for almost 1 year, but I´ve been handicapping for 4 years...but once in a while;
- I am not from US and here in my country the DRF form (which, obviously is not called DRF) has a very limited amount of info...mainly the finish place, the number of horses in the field, the total time, the surface, the distance, the top 3 finishers, the number of lenghts to the winner, and jockey weight..nothing else! (for his last 5 starts only)
- Here in my country the main track is the turf track, not the dirt track.

Should I buy one of these books? (Picking Winners - Beyer, Horse racing for dummies - Eng, Handicapping 101 - Free)

Will they be useful to me? Which one of them?

Thank you very much!