- Passkey EA Review, Part 1: Individuals IRS Enrolled Agent Exam Study Guide 2015-2016 Edition
- Passkey EA Review, Complete: Individuals, Businesses, and Representation: IRS Enrolled Agent Exam Study Guide 2017-2018 Edition
- PassKey Learning Systems EA Review Part 1 Workbook: Three Complete IRS Enrolled Agent Practice Exams for Individuals:
- Passkey EA Review Complete: Individuals, Businesses, and Representation: IRS Enrolled Agent Exam Study Guide 2016-2017 Edition
- Passkey EA Review, Part 2: Businesses, IRS Enrolled Agent Exam Study Guide 2014-2015 Edition





























