Language is important for humans to communicate with others. Communication is one of the ways to express people’s feeling, ideas, and emotions. Nowadays, there are many countries in the world that use English as the meaning of communication. So, Loan words take part in Thai communication. It borrows words from English because Thailand use English as a second language. In this study, it focus on type of loan words in Thai novel book "Sotus Series" and analyze what type of loan words that are used in this book.