Without meaning to offend, The Cross-Time Engineer reads like the book version of some kid's teenage dream. Specifically a history nerd, probably antisocial, and destined to study engineering later.
Meet Conrad, a young engineer on a hike through Poland. After a wrong step, he accidentally ends up in a time machine to medival Poland. In just 10 years time, the Mongols will invade and kill everyone here. He cannot go back (why he can't is beyond me, the book doesn't even go into it; i.e. teenage dream, the author loves it). So instead, he uses his 20th century knowledge to transform Poland into an industrial society. And this book explains his first years doing so.
The book is deeply flawed. Other reviews point out its obvious sexism, which when read with a 2023 perspective is obviously terrible. And it isn't even limited to age-appropriate sexism (since the middle ages weren't exactly emancipated times): the first woman Conrad meets, at the start of the book in the 20th century, is called a wench, and the first thing Frankowski describes is her breasts, followed by her figure, and then her face. Talk about a flat character? Except Frankowski hardly describes her so. In any case, this language continues after the time travel, but by then it could be excused since the times have (literally) changed, right? Unfortunately the 20th century Conrad perfectly adapts to Medieval times in his view of women: he sleeps with plenty young women (14 and above), he sleeps with many, and agrees that they should not do any work. How can this character writing be justified when his entire arc is him bringing 20th century concepts (engineering, accounting, hell even socialism and justice) to the world of the 13th century? Yes, I am the main character who can make hardened steel, windmills, looms, but I conveniently forgot my view on social injustice?
Yes, my rant is not entirely fair as I understand that the book gets more immersive when ignoring basic principles on equality and instead reading the book as a "first hand account" of a successful man living his life in the middle ages. I just don't think writing every woman off as a dumb whore adds any immersion at all, and instead just reads like, to put it coarsely, cringe from the past.
In any case, the rest of the book is great for any reader who can read past what I just rant on about. As said, it is an engineer-with-a-geek-for-Medieval-history's wet dream. Conrad is the definition of a Mary Sue: he knows fencing and unarmed combat. So he can kill knights. He is a master engineer, so he can build anything. He saw his mother sew, so he builds looms. Welcome to the Conrad show, expect a one-man show tonight.
Why do I still give it 3 stars? The book that's shown if you move the aforementioned shitshow curtains away is well written. With my limited knowledge, I like to think this gives a great perspective on society in the Middle Ages. The role of the Church, the feudal system of vassals and nights, living conditions of the poor etc. It especially shines in its portrayal of people's mindset and the effect of the church on it all. Hardly anyone is open to the innovations of Conrad, even though the blacksmith is left with harder steel, the women with an easier and faster job than weaving, and everyone with more wealth. Church doctrine makes everyone look at Conrad as a witch, and even when that hurdle is jumped over, guilds prohibit Conrad from implementing meaningful changes that create competition.
And what's left is a story that, despite it's horrible worldview, just really did tickle me in its unique niche. One man, building up a civilization through his creativity, ingenuity, and sheer technical knowledge. Add to that some tense action scenes, I like that too. Then through the sheer pace of the book it almost feels as if you are reading a game of Civilization, i.e. you can really feel the towns developing and becoming more advanced. As if you are reading a city builder. This recipe is one I love, I even want to read the sequels, but I can not overstate how terrible some of the writing is. Any reader who cannot overlook this (I praise you for it), steer away: you're missing a unique book that's definitely not for everyone.