It is 55 BC/BCE and the British Isles have been home to the Celts for hundreds of years. In A United Force an ambitious Roman general named Julius Caesar plans to change all that. Will the Celts be able to defend their homeland?TreeTops Graphic Novels bring historical periods to life. These 24 action-packed graphic novels combine fiction and non-fiction texts in the one theme - from Vikings to gladiators and pirates to code-breakers.Non-fiction pages throughout give context and add depth to the stories to support comprehensionA different kind of reading challenge to engage your readers, especially the boys. Short captions of text, closely linked to the pictures, are perfect for second-language learnersIncredible stories are woven around amazing characters and events, exciting themes and stunning artwork to engage both independent and reluctant readersCross-curricular topics in history and geography stimulate discussion and inspire creative writing.