All TSIE books are available for purchase in the University Bookstore located on the second floor of the LBJ Student Center. Go inside the bookstore and then upstairs to the textbook department. Locate the ESL section or ask an employee to assist you.
To be sure about which books to buy, you should attend the first class meeting and verify with your teacher or the class syllabus which books you are required to purchased based on your level in the class.
All students are required to purchase their own textbooks and materials for class. Making photocopies of textbooks or taking pictures of the pages of the book for yourself or for others to use for class is illegal. Make sure you are buying and using your own materials and textbooks for each of your classes.