What if the purchase button shows "Unavailable"? This upgrade is exclusively for customers who have already purchased the EPE Cheatsheet Standard eBook — either as a single eBook or as part of the eBook + Paperback Bundle. You already have the full cheatsheet content. This upgrade adds the MCQ practice component — 135 EPE-style questions with detailed explanations — at a fraction of the cost of buying the Plus version outright. If you see the purchase button showing "Unavailable", it means there is no record of a Standard eBook purchase on your account. You'll need to purchase the Standard eBook first before this upgrade becomes available to you. If you do not yet own the Standard eBook or Bundle, please consider purchasing the Plus version directly instead. Upgrade pricing Standard → Plus upgrade — $60 About Your 90-Day Access The upgrade grants you a new 90-day Plus eBook license, independent of your original Standard purchase. Your access window starts fresh from the date you purchase this upgrade — giving you a full 90 days to study the complete Plus version, regardless of when you originally bought the Cheatsheet. The same single-user license terms apply. Sharing or redistribution is not permitted.
