Every book here had to still work with no media budget. That single test removes most of the genre, because a great deal of marketing writing is really about deploying money efficiently rather than getting chosen without it.
What survives is positioning, language and psychology — deciding who you are for, saying it in words a customer would use, and understanding why someone buys from the second-cheapest option.
Watch the publication dates. The strategic thinking in the older titles holds up; the channel advice is dead, and a confident chapter about where the cheap attention is will be wrong. Take the argument, ignore the tactics.