I would buy a good English grammar book at perhaps the high school level. Make sure it covers these areas: the eight parts of speech, what parts of speech they modify, and what questions they answer. This will help you determine when you need a noun, adjective, or adverb. the capitalization rules: Proper nouns, countries, languages, people's names, day and month names, etc. how to use simple relative clauses (which, that, who, whose, where). how to use conjunctions (FANBOYS and common subordinating conjunctions). how to form the six tenses and when to use them. explanations of verb person, number, mood, tenses, and voice, participles, and infinitives. You should also know that the present tense has three different forms, each of which has specific uses.

Webster's American Dictionary of the English Language, 1828 Edition

Sean,thank you for your help.Im going to the book shop now, I will refer to your suggestion. I love the movie"the hobbit"^_^

What kinds of books do you normally like to read? Young Adult novels are good for non native English speakers. Harry Potter is good, and it get more difficult and serious as the characters age. The Hobbit is another book that is not too difficult if you are learning English.