One thing we try to emphasize at LifeTwo is thinking about root causes. A lot of issues that happen in what we usually think of as "midlife" -- say, 40 - 60 -- have nothing to do with age per se -- they just happen to occur during that age range. For instance, divorce seems to be a "midlife" issue but is usually tied to the length of the marriage. Career dissatisfaction can occur at practically any age ... and so on. So I'd encourage you not to write off books, website, etc aimed at people going through midlife crisis in middle age -- many of the lessons could apply to you.

You're right that there is very little out there covering midlife crisis issues for anyone younger than 40. One magazine article that somewhat fleshes out the book you mention is here: Midlife Crisis at 30? Gen X Needs Choices. If you find anything, please keep us posted!

You may want to focus on each aspect of your "chaos" by itself (sounds like you've done some of this thinking already). That way you can find the best career resources that apply to you, the most on-point relationship advice, etc.

Hope this helps a bit!