I am with you on this one. But I think many tech books carrying some of flavor of being a manual, especially those centered around some particular library/fram

I am with you on this one. But I think many tech books carrying some of flavor of being a manual, especially those centered around some particular library/framework, thinking of 'XX in Action' series. Ones that talk about more abstract ideas, like on the art of developing/testing software, will continue to thrive. However, I think the bread and butter for the tech publishing industry are those manual books, which follow a relative mature format of writing, and are produced in bulk each year. If they are going away, this might speak trouble for the whole industry. But that is just my hypothesis for now, I hope the industry find a way to sustain itself.