Astra FireStar and the Ripples of Time

When new girl and time-fugitive Astra crashes a space-octopus into twelve-year-old Sam's school, he swaps his unhappy home life for a timeless adventure to the stars. On the run from the time-police, they travel to far-off planets, in space and time, meeting new and unexpected friends, as well as many enemies, and growing a closer friendship than Sam could possibly ever have imagined. But when given a chance to resurrect his dead brother in exchange for Astra's freedom, he must decide - change his past or forge a new future.