Well, 'The Babysitters Club: Dawn and the Impossible Three' is also worth reading. It shows how the club deals with difficult babysitting situations, and you can see the different personalities of the club members shine through as they work together.
I think 'The Babysitters Club: Kristy's Great Idea' is quite popular as it's the start of the whole series and many people like to begin with the origin story.
The order of the Babysitters Club graphic novels typically follows the sequence of the original book series. However, different publishers may have slightly different arrangements. You can usually find the order numbered on the spines or in the official series guide.
The Babysitters Club graphic novels are created by multiple talented individuals. Gale Galligan is also an important author. Her illustrations and storytelling in these graphic novels have contributed to their popularity, making the characters and their stories come alive in a vivid and engaging way.
The order of the Babysitters Club graphic novels can be found on the official website of the publisher or by checking major book retailers' listings. Usually, they are numbered in the sequence they were released.
It's hard to give an exact number. The number of graphic novels of The Babysitters Club can change over time as new ones are released. Your best bet is to check with a reliable source like the publisher or a comprehensive book database.