Philip-Jon Haarsma (pron.: /ˈhɑrzmɑː/), more commonly known as PJ Haarsma, is a Canadian born science fiction author best known for his creation of the Rings of Orbis universe, which encompasses The Softwire series of books. Haarsma created a free, online role-playing game, also called the Rings of Orbis, set in the same universe. Both the book-series and the game target young, often reluctant readers in an attempt to encourage them by rewarding them for reading.
Haarsma developed a school presentation program in which he discusses The Softwire books, astronomy, and other science fiction and science fact topics. He is also one of the co-founders of The Kids Need to Read Foundation, a United States Internal Revenue Code 501(c)(3) tax exempt public charity that purchases books to donate to underfunded schools and libraries.