That's because OP is playing the internet marketing game (very good work, OP ;), in that world "niche" means "market vertical subset."

For OP's case:

> Market Vertical = Technology

> Niche / Market Vertical Subset = Webscrapping

Interesting how each world places its own connotations on words, and if you don't speak the "language" -- even though we're all speaking English! -- miscommunication is guaranteed.

Thanks! You're right it's not a "niche" subject. But Web Scraping with Java is probably a little "niche"!

You would expect this book to be filed under ‘general interest’ in a bookstore?

Niche compared to something like nutrition, personal finance or even "learn to make web apps".