 Juola has also created a Java-based open source authorship attribution suite JGAAP, Java Graphical Authorship Attribution Program, with several students at Duquesne University including David Berdik, Sean Vinsick, Amanda Kroft, and Michael Ryan .Patrick Juola is the author of Principles of Computer Organization and Assembly Language, a textbook on computer organization and assembly language, published through Prentice-Hall.He also wrote Authorship Attribution, a survey and technical monograph on authorship attribution, the process of inferring the author or author's characteristics from the text of a document, published through NOW Publishers.