There were many different versions of Sherlock Holmes that might have some subtle differences. Generally speaking, if you want to collect a more complete and high-quality Sherlock Holmes collection, it is recommended to choose an authoritative edition such as the original British version of Sherlock Holmes: - Sherlock Holmes: 1928 edition by the University of London Press. This was a classic detective novel, the first complete release of the Sherlock Holmes series. - Sherlock Holmes: 1954 edition by the University of London Press. This is the original reprint, and the quality is very good. - Sherlock Holmes: Shanghai Translations Press, 1986. This was one of the earliest Sherlock Holmes novels in the mainland of China. The quality of the translation was relatively high. Of course, different people might have different interests and needs. They could choose the version that suited them according to their own preferences.