The phrase "reads upon" is often used to describe the act of reading or studying a particular subject or topic. There are several synonyms for this phrase, including "peruses," "scrutinizes," "examines," "analyzes," "explores," and "studies." Each of these synonyms has a slightly different connotation and may be used in different contexts. For example, "peruses" suggests a casual, cursory reading, while "scrutinizes" implies a more careful, detailed examination of a text or document. "Studies" and "analyzes" both suggest a more in-depth exploration of a particular topic, while "explores" implies a more wide-ranging investigation or inquiry. Ultimately, the choice of synonym will depend on the context in which the phrase is being used and the specific connotations and nuances that the writer wishes to convey.