I found a few articles about dynamic withdrawal rates, decision based asset allocation in retirement, and started reading "Living Off Your Money, ..." by Michael McClung. All these strategies aim to spend at higher than the 4% rule, up to +1% overall, by using decision trees that examine your returns to date and market performance in the near past to choose a withdrawal amount each year.
Are there other books to read that are more mainstream? What I have read so far seems a little untried, just theoretical.