In 1764 the eight-year-old Mozart wrote the Sonatas K. 10–15 in London. Leopold Mozart was only able to understand his son’s musical genius in terms of it being a God-given wonder: “That my boy […] knows all of this with his 8 years that could be expected of a man of forty years. In short: whoever has not seen or heard it, cannot believe it”. According to the title page the six sonatas can eitherbe played as piano trios, violin sonatas or simply piano solo. As we have already published them inthe form of piano trios and violin sonatas, we are now presenting them in an Urtext edition for piano solo.