One book I'm reading lately is Early Retirement Extreme by Jacob Lund Fisker. The book asserts that one can have an "extreme" early retirement by accumulating wealth thru only 5 years of work, and choosing to lead a meaningful retirement life while spending low to the tune of $20-30K a year.
If you think it is another personal finance book about how to save, invest and retire, you are wrong. The book is written in a more academic fashion than I thought, full of philosophical discussion and historic references. Even though I'm only 80 pages into this 238-page book, I found enough "nuggets" that are thought-provoking and challenge me to revisit my more "traditional" path toward early retirement. For a quick recap, take a look at this wiki page about Early Retirement Extreme, or ERE.
For a slightly more graphic understanding of the approach, I'll recommend this blog post and the accompanying diagram (for those finding interest in astronomy, this diagram reminds me of the Hertzsprung–Russell diagram):
If you have read the book, what's your thought of it?