There are numerous synonyms for the phrase "wrote one book". Some of the most commonly used synonyms include "authored a single book", "penned a lone publication", "composed a solitary work", "produced a lone manuscript" and "created a singular tome". Additionally, other synonyms that could be used to convey the same meaning include "drafted a lone volume", "crafted a single text", "formulated a solo publication" or "compiled a one-off publication". Whatever the synonym used may be, the central meaning would always be the same, referring to the act of writing a single book.