Volume 2 reverses roles a little bit; where Volume 1 focused mostly on Myne bringing her modern old-life knowledge to her new world, Volume 2 sees the setting teaching *her* new things about the world, usually about the basics of survival in a place that doesn't have modern amenities. (For example, there's a chapter devoted to pig-killing day and the work that goes into preserving enough meat to ensure they'll survive the harsh winter.)
Myne's interest in books and reading - mostly a source of exaggerated humor and her single-minded goal in the first book - also becomes more intrinsic to her life in her new setting, as her interest in learning the written language of her new world and her natural skill with numbers gives her lots of opportunity to succeed in this setting, where many are illiterate. (After all, even though books barely exist in this world, and though most commoners are illiterate, reading, writing, and arithmetic are still intensely valuable skills.)
She still progresses in her goal to make books - this time gathering the materials to make clay tablets to record information on - but Volume 2 develops the story in a way that moves it away from the one-note direction of the first volume, and makes me eager to read more!