Its always good to see a major retailer having similar ideas as you. I was looking at the Integrating PHP Projects with Jenkins book by Sebastian Bergmann. I always check out the pricing structures first because I’m always interested. They have the pricing structure as follows:

• Print: $19.99
• eBook: $9.99 (so 50% of the price)
• Print & eBook: $21.99 ($2 for the eBook)

O’Reilly are pricing eBooks exactly as I think they should be done. The concept that makes the most sense is that an eBook is a cheap optional extra when you by the paper version or otherwise as a significantly lower priced stand alone copy. So hooray for O’Reilly. O’Reilly have recognised the other big failing of eBooks I hate – which is that their eBooks are DRM free. Awesome. Plus beyond that they have for a very long time (more than a decade) had the Spotify model of books with their Safari Books Online catalogue e.g. you can start reading the book I was interested in straight away and then pay out $42.99 / year to read all the books you can ever get your hands on.

So basically, never buy an O’Reilly book through Amazon, buy it directly through O’Reilly.