Through "instant messages," chronicles the struggles best friends Maddie, Angela, and Zoe face during their freshman year in college, each of them in a different state, two wondering if their romantic relationships will last, and one determining that roller derby is the key to keeping the trio close.

Fifth-grade best friends Katie-Rose, Milla, Yasaman, and Violet are determined to save a new student from Modessa's evil influence, but Katie-Rose is busy not flirting with Preston and all four are distracted by trying to organize Yasamin's sister's birthday party.

Now high school juniors, Zoe, Maddie, and Angela continue to share "instant messages" with one another as one of them experiments with marijuana, another gets her first boyfriend, and the third moves three thousand miles away.

Winnie knows that change isn't all it's cracked up to be, especially when it means her best friend, Amanda, might be dropping her for someone else. Throw in a grumpy teenage sister, a cat who gets trapped in the wall, and a crush who has pinkeye, and you've got one big mess--one that Winnie's not going to clean up! Winnie's decided that she's going to remain exactly the same, no matter what the rest of the world does. But every month brings crazy...