17-year-old bookworm dies and gets reincarnated into another world into the body of a very poor sickly 5-year-old. She has to come to terms w/ the limitations her low status and weak body bring her and constantly searches for ways around them. She learns the importance of family and begins to learn how to become a merchant, in order to help her achieve her dream; to make her own books, be surrounded by them and able to read as many of them as she can.
Pretty interesting and funny however I would have liked some more background info on how her situation came to be and how her new world works in general.
Ascendance of a Bookworm