At first I sided with the reviewers that were overwhelmed and pondered why on earth this many tables and sub systems could be needed. Then I slowed down, read entries that interested me, then read more and I realized this is an incredibly well thought out toolkit for more solo RPG situations than you can imagine. That's why it is a five star product. This isn't meant to be an oracle, you can use Mythic, the Encounter Buiilding Decision Deck or my favorite, The Gamemasters Apprntice for that. This massive book is meant to be your go to for thins like "What does the Big Bad Guy do next?" or "How soon do we need to leave on this quest before it's too late?". There's also a section on how to alter the rules of your favorite system to optimize play. In summary, this is a solid encyclopedia for solo play. If you want something more focused I recommend the Flex AI Guidebook that centers on monster/NPC actions and is excellent or the also excellent Flex Encounters sourcebook.