For hundreds of years, Atlantis has secretly traded with humans. But now their supply of gold has run out, and the fish people have resorted to kidnapping humans for large ransoms. Can Danny and his dad break into the legendary city, free the hostages, and get back to the surface before they run out of oxygen? The Battle of the Undersea Kingdom is part of the Toxic series, published by Ransom Publishing, a specialist publisher for reluctant and struggling readers. The Toxic books offer exciting, shorter stories (just 48pp each) for readers who may find longer books too daunting, but who still want fast-paced, adventure stories. They are illustrated throughout.The Battle of the Undersea Kingdom is ideal for reluctant readers aged 9-12 with a reading age of 8-11 years.