When Miss Greer asks each child in the class to write a story, second-grader Aaron, who loves to draw but struggles with reading, creates a story using pictures.

Andy and Terry must get past their differences to save their story ideas from a herd of spy cows.

"As an artist creatively incorporates her slipups into a drawing, readers see the ways in which 'mistakes' can provide inspiration and opportunity, and reveal that both the art and artist are works-in-progress"--

Andy and Terry travel through time trying to save their treehouse from highly talented, angry ants and Inspector Bubblewrap the building inspector while rushing to meet their publisher's deadline.

Three more stories of Martin's plans unravelling. This time, his school is having a parade, the illustrator of his favorite comic book will be visiting his classroom, and will show him and his classmates how to draw Zip Rideout.

When Andy develops a severe toothache that prevents him from writing new jokes for their book, Terry uses their fantastical treehouse's money-making machine funds to purchase a Joke Writer 2000, with unexpected results.

¿Quién no ha soñado con vivir en una casa en un árbol? Y si además tiene 39 pisos, ¡la diversión está asegurada! Andy y Terry viven en una casa en el árbol de 39 pisos. Antes era una casa en el árbol de 26 pisos, pero han añadido unas cuantas cosas. Tiene la cama elástica más alta del mundo, una cascada de chocolate, un zoo de crías de dinosaurio donde SÍ se puede tocar a los animales, un volcán activo, un elefante boxeador, la montaña...

Who wouldn't want to live in a treehouse? Especially a 13-story treehouse that has a bowling alley, a see-through swimming pool, a tank full of sharks, a library full of comics, a secret underground laboratory, a games room, self-making beds, vines you can swing on, a vegetable vaporiser and a marshmallow machine that follows you around and automatically shoots your favourite flavoured marshmallows into your mouth whenever it discerns you're hungry....