Damodaran's approach and Koller's are actually quite similar. If you combine Damodaran's "Valuation" with "Dark Side of Valuation" + "Stories and Numbers" you will probably have a slightly better, more logical consistent way of valuing any company. Also more exotic ways, e.g. real options are covered at AD. Anyway, liked this valuation book a lot and it is definetly one of the best books on the topic.