In Raina Telgemeier's Sisters, Raina and her little sister's relationship is under the microscope. Despite having always prayed for a little sister, Raina realizes as soon as her sister comes home with her parents that things may not exactly have worked out as she planned. Her sister is a fussy baby and often moody toddler who likes to play by herself. Plus, Raina herself has to learn to share space and time -- and of course, she struggles in the beginning. The sisters squabble over the years until a three-week family road trip from California to Colorado changes everything.
In Summer at Meadow Wood, Vic and her little brother have been sent off to summer camp for eight weeks. Although summer at Meadow Wood seems to be a regular occurrence, Vic is convinced that the reason they've been "shipped off" this time is different. Besides things are going poorly between her parents. As a result, she's not excited to be there. Still, she tries to make it work, reconnecting with her friends in Yarrow camp while trying to be a good camp sister to a younger camper, Vera.
In Caterpillar Summer, Cat and her brother Chicken spend a lot of time together because no one knows how to calm him down like she does. Chicken hates loud noises and is obsessed with sharks. Since their father (who was Black) died, their mom (who is White) has had to work longer hours to provide for them. It doesn't help that she actually LOVES her job and is sometimes a bit too eager to leave Cat in charge of her brother.