Spain may not have the largest ebook publishing industry, but it does have a major ebook search engine – Neotake. Based in Malaga, this engine, developed by CicloLimite, has social network and price comparison features.
They have indexed over 4,400,000 texts, and, in an email to me by the founder, José Gómez Pérez, say that they are “growing exponentially in scientific texts”.
They’ve just published a metrics report and here is the section on format based on 4,338,762 books:
Take a look and let us know what you think. You can find them here.