I'd be more than happy to hear what kind of courses/books have you found useful when learning about sales and marketing?
It's kind of hard to find something relevant on Google, especially if it is related to digital marketing/sales field. If someone is good at it, he probably already marketed the book/course pretty well – but does this mean that this stuff is worth the money?
I've tried a few on Udemy etc. and they were covering pretty basic topics, nothing particularly useful.
What I'm looking for is an insider point of view – an author/teacher who does marketing/sales on a daily basis and would love to share how it is done.