to hide a bookcase or not?

[notamumlol]

I prefer the minimalist look, so all the clutter has gone, I however have left the books out, which im debating, maybe I should hide?

My dad has a minimalist house - think acres of glass, gloss white and porcelain tiles. He has his books on display in beautiful bookshelves and it stops the clean lines from looking bland.

Don't hide them but make sure they are filled/filed in a neat and colour coordinated fashion (though perhaps more sense to place all books by one author together?)