Now this is more like it! A much better format than a certain other product I reviewed, and it works alongside the existing epic boon system, with higher levels coming at exactly 30,000 XP. However, instead of simply taking an epic boon, this book allows you to take a new feat (with some of the limitations of the feats taken off) a level of one of your classes below level 20, or an epic level of one of your classes below level 30, which are introduced in this short, nineteen page document. While I'm unsure about some of the choices made in those classes -- such as the way every epic class gains advantage on death saves -- they all offer intriguing expansions of the classes' core competencies.
The only major problems with this product are some embarrassing slip-ups, like putting an epic barbarian's class features in the list of epic wizard class features, and a mess-up in the table of contents. But on the whole, I'm looking forward to repurchasing this work at the first opportunity.