There are online sites where it is possible to download Prentice Hall text books, such as PHschool, and Explore learning. If the whole book is not required, then particular chapters can be selected for download.
Prentice Hall publishes academic and reference books. The company specialize in publishing coursework books and training books, such as ECDL, and home study courses, such as Course Compass. It is also possible to join online libraries, for example Open Library, and borrow the e-books available in the lending programmes. Many specialist subject sites direct the users to these free downloads, relevant to their site, such as ebooks-IT