1632 plot threads refers to the complex mix of overall story arches or sequences within the best selling alternate history series 1632 series, which grew rapidly from a stand-alone novel 1632 to published works numbering in the high teens as of October 2007—and most of that since 2004. This article will attempt to survey the general meaning of the term plot threads within the series and on the very active Baen's Bar web discussion forums related to the series, in particular, 1632 Tech Manual which is the sub-forum where many of the details of the shared universe mega-series have been hammered out, researched and reported on to other participants.