Content of book appears to be skewed in TV programme

• TV or radio serial
• So a post office for each area is a drama?

Longman Dictionary of Contemporary English Word definitions in Longman Dictionary of Contemporary English
noun EXAMPLES FROM CORPUS ▪ Career Girls never devolves into soap opera , but remains a focused, complex portrayal of a friendship. ▪ Glossy, high-powered soap opera about four black professional women helping one another through a bad year in Phoenix. ...

Wikipedia Word definitions in Wikipedia
A soap opera is an ongoing, episodic work of fiction presented in serial format on television, radio, or other mediums. Soap opera may also refer to:

WordNet Word definitions in WordNet
n. a serialized program usually dealing with sentimentalized family matters that is broadcast on radio or television (frequently sponsored by a company advertising soap products)

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
"melodramatic radio serial" (later extended to television), 1939; so-called because sponsors often were soap manufacturers, from earlier horse opera "a Western" (1927). Shortened form soap for this first attested 1943.