a modern man entered an accidentally left open door and was put back to medieval Poland where he fought mongols and became a king.
a modern man entered an accidentally left open door and was put back to medieval Poland where he fought mongols and became a king.
It's not mine, as there is a distinct lack of Mongols. It's well worth reading, though. The main point of the series is the two travelers have no real special skills or knowledge.
Wheezer looks to be on the right track.
The Conrad Stargard books (starting with Cross-Time Engineer) are about young Polish engineer from the 80's who stumbles through an open door of a bar that is secretly a way station for time travellers trying to write the definitive history of everyone everywhere and ends up in the 12th century. Luckily he was trained at MIT and worked from some local place that made bespoke machinery and was a history nut and a reserve officer in the Polish army.... and had a backpack full of modern seeds.
Sound like what you are looking for?
YEars after reading the one image that stayed with me was the monks and peasantry and walked around in the snow barefoot without a care since their feet were callused a half inch deep.
You might check the Baen website as it may be in their free library or on one of their DRM-less CD-roms that have been imaged athttp://baencd.thefifthimperium.com/
Or you could buy it. I think the first few in the series are in an omnibus.
Yes I am referring to these books but can't buy because I don't live in the US and doesn't want to use my credit card. There was a site that offer free reading of these books but forgot what it was. It's not yet free in Baen's but thanks just the same.
You could try your local library for it now that you have both a title and the author's name. If they don't have a copy in their inventory it might still be available through them.
You might check Amazon in your region. I know that Baen had to take many titles out of their free library and raise some of their prices a couple years ago when they signed distie deals with external sellers (Amazon, Barnes and Noble, etc.). As for free... I dunno. You can check Google Books or the Gutenberg project, but I kind of doubt you'll find much since they are still under copyright controlled by Frankowski's estate.
Seedier places on the web might have it, but then again maybe not since he wasn't that popular of an author outside of niche sci-fi.