44-48: Rosemary Kirstein, Steerswoman series:
The Steerswoman, The Outskirter's Secret, The Lost Steersman, and The Language of Power
This is intended to be a 6 book series, but books 5 & 6 aren't written yet. It starts off as one genre (epic fantasy, standard low tech fantasy world), but with hints that it's really science fiction about a colony world, that become more frequent as the series progresses.
Steerswomen (there are some steersmen but it's less common) are a group devoted to knowledge. They travel extensively, write and research and send their research back to their base. They play an established and valued role in their society - anyone can ask a steerswoman any question, and she has to answer truthfully - which makes them valued and respected. However, if you lie to a steerswoman, or refuse to answer her questions, no steerswoman will ever answer your questions again.
The books follow a particular steerswoman, Rowan, whose research leads her into conflict with the Magicians - a secretive, and solitary bunch who are almost all under the Steerswomen's ban.
I enjoyed the world building in this book. The details about the biology of the world build up satisfyingly, the different societies and the characters are well drawn. I also really appreciated that Rowan's love interest doesn't become a massive focus - I find it disappointing when promising SF books with lead female characters suddenly veer off into romance. Nowt wrong with a bit of romance but it just pisses me off that male leads don't do that. Not a problem with this series.
I really enjoyed Rowan working things out - there aren't The Martian levels of science, so it shouldn't deter those who found that too much, but if you do enjoy reading characters thinking about science and problem solving then there's a reasonable element of that, woven in with Rowan avoiding assassination, travelling to new lands, getting drawn into local intrigue etc.