TOEFL or the Test of English as Foreign Language is not an easy exam to pass. English is not that hard to learn especially if you have the determination in learning the language. There are already a lot of people who have passed the exam so why not us? TOEFL will open up a lot of doors of opportunities in terms of career. Having the TOEFL certificates will be more advantageous to people who wish to work in an English-speaking country like the US and the UK. Anyway, the following are some books I have found online and I read a lot of good reviews so I think it might be a good idea to share them to you.
400 Must-Have Words for the TOEFL [Paperback]