"The Gordian Protocol (1) (Gordian Division)" by David Weber and Jacob Holo
https://www.amazon.com/Gordian-Protocol-David-Weber/dp/1982124598/
Book number one of a four book science fiction time travel series. I
read the well printed and well bound MMPB published by Baen in 2019. I
have the second book in the series and will read it soon.
Raibert Kaminski is a historian with a time machine, the Transtemporal
Vehicle Kleio (TTV), traveling back from the Great Library of Alexandria
in 30 BCE back to his native time in the 30th century CE. The Kleio is
a space ship 160 feet long built around the time machine with built in
3D printers and materials that can replace any part except the temporal
wedge. The 30th century historians are stealing all of the books and
scrolls before the great library is sacked and burned. But the Kleio
encounters a massive time storm on the way back and on the other side of
the time storm, everything is different.
David Weber has a good website at:
https://www.davidweber.net/
My rating: 4 out of 5 stars
Amazon rating 4.3 out of 5 stars (615 reviews)
Lynn