Looking for a nice compilation of definitions, relevant knowledge areas, techniques around business analysis and requirements engineering? It should be readily available and you would like to look into it for free?
I just stumbled across the Guide to the Business Analysis Body of Knowledge (BABOK Guide) from the International Institute of Business Analysis (thanks Rüdiger and Andrea for the push in the right direction!). The BABOK guide is available as a google book, put it also exists as a print book.
More information about the (free) availability of the BABOK guide can be found here.