The Apothecary Diaries 09 by Nekokurage
The continuing adventures of Maomao. Spoilers possible for the earlier books
More episodic than the book before, though threads pass through them: the matter of teaching maids to read and write, for instance. And one discovery, about what is sold by a merchant caravan, has unpleasant possibilities when considering past events. The kitten reappears. Mushrooms are important. She has unusual interests when buying things. She also gets an unusual gift which delights her.