 If you liked
Toshokan no Daimajutsushi
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 ...then you might like
Fushi no Kami: Henkyou kara Hajimeru Bunmei Saiseiki
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Although not an isekai, Toshokan no Daimajatsushi is very similar to Fushi no Kami because the stories both focus on the importance of written word and literature in a world where they are a rarity. There is a lot of inconvenience in both settings due to lack of technology and not being developed in general. The stories both start off with the main characters growing up in an impoverished land/village and working their way up while pursuing more knowledge.