I read about 30-100 work-related books a year and have seen salary double every few years.
I try to alternate books between different areas, more or less from these sections:
Technical(on currently used technology)
Technical(unused tech vaguely related and may be useful)
Management
Domain(scientific textbooks, best to search from related university course reading lists)
Biographies/accounts/events of typical and super users
Your salary didn't double because of books. I read a lot of work-related books, too, but my salary has been stagnant for years.
I read about 30-100 work-related books a year and have seen salary double every few years.
I try to alternate books between different areas, more or less from these sections:
Technical(on currently used technology)
Technical(unused tech vaguely related and may be useful)
Management
Domain(scientific textbooks, best to search from related university course reading lists)
Biographies/accounts/events of typical and super users