The Cross-Time Engineer (Adventures of Conrad Stargard, volume 1) by Leo Frankowski

[james_davis_nicoll]

A Polish engineer is transported into the past, ten years before the first Mongol invasion of Poland. Luckily for him, his allies include the book's author.

The Cross-Time Engineer  (Adventures of Conrad Stargard, volume 1) by Leo Frankowski 

Comments

[neotoma]

In my defense, I was 13; I think I read four books in this series.

But this was one of the first series where I read a book, hit an ick, and said 'nope'. I probably read as far as I did because I really do like time-travel stories.