I'm new to Calibre and just installed it yesterday to manage my books. It seems great for handling books in various formats. I have thousands *pdf books and about 250 printed books that I'm going to add to Calibre regularly. I'd like to have two different databases, one for electronic books (mostly pdfs), and another one for printed books, and don't like to have both categories in a single database and Calibre displays printed books and *pdfs ebooks side by side that cause confuses me when I look up a title.
Is it possible to have two different databases and load both at the same time or just load one of them and browse books? If the answer is "no", what are your suggestions to avoid confusing printed books with electronic books?