Marvin Redpost has finally figured out why he doesn't look like anyone in his family. He's not really Marvin Redpost—he's Robert, the lost prince of Shampoon!

Marvin is shunned by his classmates, best friends, and teacher after he is unfairly fingered as a nose-picker by the class bully.

Will kissing his elbow really turn Marvin into a girl? Casey Happleton claims it's so, and Marvin starts to believe her after his lips "accidentally" brush his elbow.

Marvin's friends think he's the luckiest boy in the world when his teacher asks him to dog-sit for a week. He gets to be alone in Mrs. North's house! But pretty soon it starts to look as if Marvin is not so lucky after all....

It's no ordinary Thursday for Marvin Redpost and his class...

It's "hole day," and even Mrs. North and Principal McCabe are wearing their very worst clothes. It seemed like a fun idea that morning, but now they're expecting company. The president—of the United States!—is on his way. And...

Marvin and Stuart get to sleep over at Nick Tuffle’s house for Nick’s birthday. They set out sleeping bags in the Tuffles’ backyard. Stuart and Nick fall right to sleep, but Marvin tosses and turns. Then he hears a noise, and something glowing zooms over his head. Is it really a flying birthday cake? Or something else? The next day, a very strange new kid shows up at school. . . .

Many have tried to master the slippery slopes of Suicide Hill on their bikes. Marvin's older brother has conquered the hill, but Marvin has steered clear. Until now. The word at school is that Marvin will be taking on the hill with his new mountain bike. But the truth is, he...

When Marvin Redpost agrees to go over to Casey Happleton's house, he doesn't know what he's in for. Casey shows him the magic crystal she has just found and offers to give Marvin a few wishes. Is the crystal really magic? Or is it too good to be true?