12

The best-known resource is Project Gutenberg, which exists for precisely this purpose.


10

As Donald points out in his answer, (new) devices would have to support SVG 'images' as support for SVG is specified in the EPUB 3.0 standard. For line drawings, but also for zoomable images (maps come to mind), this is a vastly superior format over any pixel based file format. How soon that adaptation will happen will be influenced by how easy it is to ...


8

The ePub 3.0 standard specifically names SVG as one of the core media types to be supported. The 2.0 standard also names SVG as one of the supported types in the img tag documentation. So any device supporting ePub would have to be able to handle an SVG image, which is the vast majority.


5

The short answer is no, and I don't expect there to be anything like that with a single recommendation. The reason is that different input material is better rendered in different image file formats. All material handles well in non-lossy formats (among others most of the TIFF formats, PNG), however such format produce large files. When you look at space ...


4

All the work on Wikisource is free (CC or PD) by US law. It can be downloaded as EPUB with download help available


4

The web site Mobile Read maintains a library of public domain eBook files in various formats.


3

Yale University's Avalon Project has a great collection of free materials in the law, history, and diplomacy realm. Also, Amazon has lots of free Kindle versions of various works that are no longer under copyright protection. For example, you can find free Shakespeare materials here.


3

The 2014.1 version of the "Amazon Kindle Publishing Guidelines" indicates support for many SVG elements -- including -- see page 26. I'm not entirely sure whether the svg can include embedded bitmaps though. Also, http://epubtest.org/compare/ has some entries for device support by svg feature. Significantly I note that Kindle data has not been filled in, ...


2

This article from 2013 says: for some reason, SVG image support in modern products is still a kind of an afterthought, and it shows. The EPUB standards authors were nice enough to include support for these files in the EPUB standards, which is great in principle, yet they included content negotiation mechanisms so that SVG support is still technically ...


2

This is a great question, and I don't have any inside knowledge about how search engines interpret metadata for books. I checked the source of several book distributors and found that there's an open graph generator for books. http://webcodetools.com/open-graph-generator/book Librarything, Smashwords and Harper Row publishers embed ebook info in these ...


1

First, it's important to keep in mind that css support on ebooks significantly lags behind css support on the major browsers. EPUB only supports a subset of css. Among the many challenges of producing ebooks is that if you test the html first in browsers (as I do), the ebook reading system won't necessarily render it the same. There used to be a matrix ...


1

Since most epub3 readers and current Kindle models and apps support popup footnotes, the easiest solution would be to use footnotes for all book references. What app(s) are you using to write your book?


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