A couple of weeks ago, I was asked how you could save a web page as a pdf on the iPad. The problem was that when the teacher used the Save PDF to ibooks function available on the Safari browser, she found that she would lose crucial information as the app would ignore the sidebars. This is a problem when you are dealing with something like a recipe, where the ingredients are listed as a side bar.
I found this article gives a nice little workaround to this problem. There are a few steps to put in place in the beginning, but then is easy peasy to use when you want to convert a document. i went through all of the steps and it works!
Bonus: it allows you to open your PDF in many different apps, not just ibooks. Here is a screenshot of a chocolate cake recipe I converted to a PDF using their method: