From the bestselling author of Horrible Histories, named ''the outstanding children''s non-fiction author of the 20th century'' by Books For Keeps____________________King Vortigern thinks he''s so clever but his servant Mervyn knows he is playing a dangerous game. Can Mervyn keep the King safe from the invading Saxons, Pictish raiders, and a beautiful Saxon princess?Join master storyteller Terry Deary for a trip back in time to Saxon times and an exciting adventure.____________________‘Bubbling with wit, language play and robust dialogue....just the right mix of ingredients to trigger young readers'' interest in all things historical.’ Books For Keeps