WTK: What the He!! is Strawing?

The most commonly used reference book to identify luger variations by most collectors is Kenyon's "Lugers at Random" which I sell new postpaid @$60. In addition, once you have identified the variation, it is handy to have "The Blue book of gun Values" which will give you a ball park value, based on condition, of an all matching example of each variation. There are certainly more current more detailed references available, to wit, Jan Still's 5 volume set of Axis Pistols. The 3 volumes specifically on lugers published thus far retail for $65 each.