What is your approach to series?

[Albertosaurus Rex]

I actually like building a huge collection of books. When I visit other people's homes, I always check out their bookshelves. "Show me your bookshelf, and I'll tell you who you are", as an old Dutch proverb goes.

My bookshelves have been getting awfully crowded lately, though. I might have to start putting rows before rows and selecting after that has run its course...