Claudia and Mean Janine: A Graphic Novel (The Baby-Sitters Club #4) by Raina Telgemeier (Adapter, Illustrator), Ann M. Martin (Author)

Claudia and Mean Janine is the 4th book and I read it after book 5! I would recommend reading them in order due to minor information but it's not necessary. 

Claudia and her sister Janine are incredibly different. Claudia is more artistic and fun while Janine is much more studious and serious. Their differences often get in the way of their relationship but when a family member has a serious illness will they learn put their differences aside and make peace?

Claudia and Mean Janine explores sister relationships and the pros and cons that come with it. The Baby-Sitters Club keeps on running as normal and they deal with tough clients while being supportive of Claudia.

Another easy read just with the graphics were a bit better!