Mathematics texts with titles that would mislead a beginner who naïvely takes words such as "basic" and "elementary" at face value are a bit of a running joke, particularly when you go past the undergraduate level.

Just look, for example, at the table of contents to André Weil's "Basic" Number Theory book: https://link.springer.com/book/10.1007/978-3-642-61945-8#toc