He could submit his biographies to a publishing house. There are a few aspects to consider when choosing a publishing house: 1. Reputation of the publishing house: You can check the history of the publishing house, readers 'comments, and other information to see if the publishing house has a good reputation and a wide readership base. Type of publication: Biography novels are usually suitable for professional publishing houses such as literary publishing houses and cultural publishing houses. However, they could also choose different types of publishing houses according to their preferences, such as novel publishing houses, humanities publishing houses, etc. 3. Range of publication: The range of publication of biographies is relatively wide. You can choose a publishing house that suits your work style. 4. Manuscript quality: The quality of the manuscript should also be considered when choosing a publishing house. If the quality of the manuscript was high, they might get more recommendations and opportunities. 5. Method of submission: Different publishing houses may have different methods of submission. You can check the official website of the publishing house or contact the editor of the publishing house to understand the method of submission. When choosing a publishing house, one needed to consider a number of factors and make a choice based on the characteristics of one's work and the actual situation.