A Language of Dragons by S.F. Williamson is a debut young adult fantasy novel set in an alternate 1920s London where dragons and humans coexist under a fragile peace treaty. The story follows Vivien Featherswallow, a determined young woman aspiring to study dragon languages. However, her life takes a dramatic turn when she inadvertently ignites a civil war, leading to her family’s arrest and her sister’s disappearance. To save them, Vivien accepts a mysterious position as a codebreaker at Bletchley Park, where she must decipher a hidden dragon language that could unravel the very fabric of their society.