"Workbook" is a term used to reference a spreadsheet "project" in Microsoft Excel. A spreadsheet is typically a single tab, whereas several tabs (each a spreadsheet) is a workbook. I went looking through my old posts and evidently I indicated that I would update the Google sheet from time to time (I am the author), and I would wait on uploading the Excel version until it was complete. I have not uploaded the Excel version to the resources section yet. I just made a couple of edits to it this week. It seems that I should go ahead with uploading it to the resources section, as it is pretty much as complete as I intend to make it.