It is the summer of 1961, and eleven-year-old Arno Creelman wants nothing more than to be an astronomer. Fortunately, his struggle with claustrophobia has little impact on his one true passion. Unlike his annoying friend Buddy, who wants to become an astronaut and is not at all bothered by the idea of flying in a cramped space capsule, Arno dreams of exploring the galaxies with powerful telescopes back on Earth. But first he has to enter a local radio contest and win a visit to the new observatory that is about to open near his town. The ribbon will be cut by Arno's idol, Jean Slayter-Appleton, a renowned astronomer whose weekly columns he clips for his own notebooks. When he finally manages to phone in and correctly answer the skill-testing astronomy question, which earns him an invitation to the opening, Arno is thrilled. Then a new boy moves to the neighborhood, and he seems to challenge Arno in every way. Robert even believes in astrology, which Arno argues is not a science at all. Before long, Arno is feeling left behind, on the outs with his friends and even abandoned by his beloved dog, Comet. And when Robert informs him that he has already been to an observatory, and tells Arno what the experience is actually like, Arno's dream becomes a cosmic nightmare.

While tracking clues from a secret code penciled in the margins of mystery novels at a public library, Derek Knowles-Collier discovers a time capsule, an unpublished author and a gravestone that may finally put his haunting past to rest. At Queensview Elementary, grade-six students are required to complete a community service unit as part of their school curriculum. Derek Knowles-Collier was sick when groups were assigned, so he is stuck with what's leftover: landscape and repair duty at the local cemetery. Derek is not happy about his assignment. When he was very young, his friend Dennis was killed by a car after running into the road to catch a ball. Ever since, Derek has had recurring nightmares, and he is afraid that spending time in a cemetery will make it even harder for him to sleep through the night. It's a relief, therefore, when his group's lessons on all aspects of cemetery care are so interesting and strange that Derek just doesn't have time to dwell on his experience with death. And when it rains, the lessons take place in the nearby public library, which takes him out of the cemetery altogether, at least for an afternoon. One day, a book arrives at the library, an anonymous donation that happens every year. On reading the book, Derek and his group mates find a secret code written on an inside margin. One code leads to the next, with the last code leading the students to a time capsule. Through a series of discoveries and deductions, Derek and his friends discover who has been sending books to the library every year. They also discover the truth behind Dennis's long-ago death, which means that Derek is finally able to put his terrifying memories (and his nightmares) to rest. INCLUDES A SECRET CODE FOR READERS TO DECIPHER!