Seeking books for PPL on E-book format

[Claudio1891]

Hi Everybody.
I’m a wannabe on his first step of buying the books for the seven PPL ground exams.
I thought to myself that this would have been a great chance to buy an e-book reader for my studies.
I travel a lot by Ryanair and Easyjet and I was thinking that an e-book reader would be much more light and less cumbersome than 7 books! (Ryanair weight limit is 15kg and Easyjet is 20kg).
Also I believe that the more people will start to use e-book readers, the better for the environment: less cut trees!
I’ve been looking everywhere on internet for the PPL books in e-book format, but I’ve found nothing.
You guys are my last hope.
I hope also I’m helping or giving inspiration to someone else with this thread.

[PIELORD]

I believe Great Circle sell PPL/ATPL study aids via iTunes. Hope this helps.

[Claudio1891]

Thanks Pielord, Good Hint
Unfortunately it looks to me that they offer only questions and answers applications, to get you ready for the exams.
I will definitely consider buying it, but still I haven't got my 7 e-books.
Any other advice?