How do I distinguish between old scanned books and modern originals?
The books listed on our search results as PDF/scan are older books we have scanned. The condition of the books reflects their years of use in libraries (e.g. notations, faded type, yellowed paper, etc.) The scan may have missing or skewed pages. We also have hundreds of thousands of books listed simply as “PDF” that are mostly modern, original books published by us. We have typeset and designed those books and then converted them to PDFs. Therefore, you can search those books by keyword and copy and paste text into your word processor. The books “by Wikipedia” consist entirely of content licensed from Wikipedia.
