Any suggestions for a book with realistic sibling relationships?

People with siblings close in age, can you suggest me a book (or books) that depicts a realistic relationship dynamic between siblings??

Preferably something with lower stakes like, for instance, a rom-com in which a character interacts with their sibling often or a relatively low-stakes fantasy in which the siblings travel together for a couple chapters or something.

My brothers are 10 and 12 years older than me, so my personal sibling experience is more like having a second set of parents with less responsibility 😅. I’m curious about it for a project I’m doing.