If you are interested in developing, testing, and marketing mobile apps there are several excellent eBooks available that include these topics. I liked the books so much I’ve ended up contributing to both of them. They are collaborative works with multiple contributors and authors. They are fun, easy to read and slightly quirky.

Here are links to both of them:
http://www.wipconnector.com/download/GuideToTheParallelUniverse_3rdEdition.pdf (this is the guide on how to market your mobile app). My contribution is the introduction to Mobile Analytics topic.

http://www.enough.de/products/mobile-developers-guide/ has a download link to the current version of the Development Guide – advises people on how to develop (write/create) and test mobile apps.I’ve written several chapters entirely, including the ones on testing and mobile analytics, and edit the entire book.