At the start of summer vacation, 4th grader Akiko is whisked off to the planet Smoo and must rescue its prince.

When fourth grader Akiko finds a spacecraft hovering outside her window one night, she begins the adventure of a lifetime. She is whisked off to the planet Smoo to lead a team searching for the King of Smoo’s kidnapped son. Akiko the head of a rescue mission? She’s afraid to be on the school’s safety patrol! So begins the adventures of Akiko, wherein she meets her team — Spuckler Boach, Gax, Poog, and Mr. Beeba — and sets off on a journey across Smoo to find a prince and become a leader.

In this companion novel to Akiko on the Planet Smoo, fourth-grade earthling Akiko and her odd team are on a journey to save the kidnapped Prince Froptoppit from the evil Alia Rellapor. Unfortunately, on their way to Alia Rellapor's castle, the group has gotten lost while sailing over the Moonguzzit Sea in their flying boat. With no maps available, the team's best hope is to find Queen Pwip of the Sprubly Islands, a clairvoyant, who will be able to point them in the right direction. But the Sprubly Islands aren't like Akiko's hometown, and when Spuckler and Mr. Beeba disappear one night, Akiko is left to decide how she is to survive in this strange new world.

Akiko's back! No longer simply a shy fourth-grade girl, she's become an intergalactic leader, taking her band of would-be heroes on a quest to find a kidnapped prince! Armed with a map showing the way to Alia Rellapor's castle, Akiko, Mr. Beeba, Spuckler, Gax, and Poog are nearing the end of their mission. But first they have to scale the Great Wall of Trudd. Like the Great Wall of China only bigger, the Great Wall of Trudd stretches across the landscape -- there's no way around it, under it, or through it. So Akiko and the gang will just have to find a way to go over it! But the Great Wall is just one of the many strange obstacles in their path that Akiko must overcome if she's finally to rescue Prince Froptoppit.

Akiko and her crew — Spuckler Boach, Mr. Beeba, Poog, and Gax — have faced dangers unimaginable to the average fourth-grade earthling. Now their mission is finally coming to an end. At last they’ve reached the castle of Alia Rellapor — but that doesn’t mean that things have gotten any easier. The castle is heavily guarded by robots and getting inside won’t be easy. If they do get in, they have to locate Prince Froptoppit, free him from captivity, and escape from the castle without alerting the guards or their leader, the half man — half machine Throck. Can a girl who’s too scared to be school safety leader pull it off? If anyone can, Akiko can!

Collects the features, jokes, and other supplementary materials included at the end of the "Akiko" comic books that offer another look at Akiko and her friends, the planet Smoo, and other aspects of their world.