There are not a lot of books on portable code, but Write Portable Code: An Introduction to Developing Software for Multiple Platforms by Brian Hook does a good job handling many of the topics.
Category: portability
Often indie developers get caught up in following the “big boys” and trying to do as they do. With a large company, there is a lot of focus on releasing on multiple platforms, in multiple languages, on their first release, and to create a big splash. My advice is: don’t do it.