Hi, Pablo ! In Japan, Some people recommend this book http://www.amazon.co.jp/Official-Guide-TOEFL-CD-ROM-Edition/dp/0071766588/ref=sr_1_3?ie=UTF8&qid=1361922193&sr=8-3 but I think this book for beginners who take TOEFL ;)

Thanks Nishant!

Sorry I don't know about any books because i never wrote TOEFL exam but I found few corrections in your question.Here they are : Hi everybody, I am studying to apply for TOEFL nowadays. I have been *studing for this exam for 1 month or so. I bought some books to be able to be *successful in exam, for example, now I'm reading Cracking TOEFL iBT the 2009 version. Can you people recommend me books for that? Tell me what books helped you to success on it! Thanks :) All the Best !!