Mastering App Presentation, by Jane Portman, covers many ways in which you can present apps and designs.
This can take many forms, such as a design pitch, an app page on your site on an app store.
Naturally, the design pitches don't apply to me, as I sell apps. In that area, the book coverage was interesting and I feel I learned a lot of interesting angles, but I feel there were many, many places where the book would have been better if it would show me an example of the technique instead of only talking about it.
There are also some interviews with design pros, which were mostly interesting.
It is also interesting to know that the ebook was available only in PDF format, which can be much more inconvenient to read in tablets than mobi or epub.
Overall, I found it useful and a good deal, but I paid US$12 on a Dealotto sale – for full price (US$39) it would be a little expensive.
There is also an edition with PSD templates at US$99.