- PassKey Learning Systems EA Review Part 1 Individuals: Enrolled Agent Study Guide, May 1, 2021-February 28, 2022 Testing Cycle (IRS May 1, 2021-February 28, 2022 Testing Cycle)
- PassKey Learning Systems EA Review Part 1 Individuals; Enrolled Agent Study Guide: May 1, 2020-February 28, 2021 Testing Cycle
- PassKey Learning Systems EA Review, Part 1 Individuals, Enrolled Agent Study Guide: May 1, 2022-February 28, 2023 Testing Cycle
- Passkey Learning Systems EA Review Workbook: Six Complete IRS Enrolled Agent Practice Exams 2018-2019 Edition
- Passkey EA Review Complete: Individuals, Businesses, and Representation: IRS Enrolled Agent Exam Study Guide 2015-2016 Edition