Josh Flunk and Spencer Topps are just two normal schoolboys until the ivory skull on the old walking stick in Josh's bedroom flashes.

Using a secret trapdoor under Josh's bed, they pass through the ancient Egyptian sarcophagus discovered by Josh's Great-great-great-Grandfather to become their alter egos, Zac Zoltan and his assistant Dr Brains, Masters of Zac Zotlan's Detective Agency - ready to save the world from marauding monsters.

Book 1: Return of the Chocoholic Vampires: between the Stone Age and the Iron Age was the Chocolate Age, an age which came to an abrupt and mysterious end.

When the remains of an ancient chocolate settlement are discovered, a precious chocolate amulet is unearthed and with it come the evil CHOCOLATE VAMPIRES.

Book 2: Night of the Living Bed: more gruesome adventures to follow in July.