If you like Guerilla Data Analysis there is a good chance that you would love Excel Gurus Gone Wild - Bill's latest book, soon to hit the stores in paperback but already available as an eBook from the MrExcel web store. The two belong together on the bookshelf when not being read!
I have the eBook and the paperback is on pre-order with Amazon. Particularly worth mentioning is the 60+ page Appendix - this is an alphabetical list of functions with excellent descriptions and many with examples and 'Guru Tips'.
Although not specifically aimed at the Excel beginner, I think that there is much in the book to benefit anyone seriously interested in really getting to grips with Excel.