ISBN-13: 9780141500515 / Angielski / Miękka / 2009 / 32 str.
Harry and his dinosaurs love birthday parties, so Harry's disappointed when big sister, Sam, says she's going to one - alone. Not only is it Mr Oakley's birthday, but Harry finds out that it's the dinosaurs' one hundred millionth birthday too Harry decides to throw a surprise birthday party and soon even Sam helps to make the party treats. Mum invites Mr Oakley over and he is very surprised when he arrives; in fact, everyone agrees that it's the best birthday party ever