In "Here Where the Sunbeams Are Green," Mad (Madeline), her sister, Roo (Ruby), her mom, and her dad's new 'friend' Kenneth Candy, go to La Lava, a spa. They go there because of The Very Strange and Incredibly Creepy letter, a letter in which Mad and Roo's dad sent them. Their dad is an ornithologist, and is at La Lava, tracking down bird species. But when Mad, Roo, their mom, and Kenneth get to La Lava and see their dad, he is acting very strange. Throughout a series of adventures, Mad and Roo become friends with a boy named Kyle. With Kyle and his grandparent's help, Mad and Roo find out terrible things about La Lava...