It's a quick read, well-written, and the points it makes are as true now as ever, especially I think in terms of true "marketing" - that is, identifying the subsegment among the total addressable market for your particular product that you have the best shot of converting into paid customers, and some approaches for doing so.
https://www.amazon.com/22-Immutable-Laws-Marketing-Violate/d...
It's a quick read, well-written, and the points it makes are as true now as ever, especially I think in terms of true "marketing" - that is, identifying the subsegment among the total addressable market for your particular product that you have the best shot of converting into paid customers, and some approaches for doing so.