Do you keep reference books on your shelves at home? What’s your first port of call when you need information – the internet or a book?

I do have reference books most of mine are history related, Renaissance, Medieval, Revolution ect ect. I also keep some reference books for vet care of Cats, and other Cat related books. I have some horse training reference books and some general horse related reference books. My first place that I go is my books and than the internet, if it is something I have books for if not, than the net it is.