All Rock wants to do is celebrate his 3 billionth birthday with his friends. But who will come to his party? It's been a long few years since Rock joined the planet in something called the Big Bang. Since then, he's seen a few friends come and go, but now that it's his 3 billionth birthday, he just wants to celebrate with his best friends, Gary the Dinosaur and Worm. But Worm is always busy, and Gary the Dinosaur hasn't responded. Will Rock have anyone at his party? A hilarious new picture book from Eoin McLaughlin, with brilliant illustrations by Mark Chambers, this zip-through-time story will have hearts melting for Rock, who's been there, done that (but didn't bother buying the t-shirt because he's a rock).