There are plenty of DRM unencumbered ebooks around if you look. But if you do find yourself dealing with DRM there are a number of methods of removing it.
Personally, if I already own the book in question I pirate the e-book, I don't see anything wrong with this as the author has already received equivalent royalties for the book. In the cases that I do not own a physical copy, I will generally buy a physical copy and then pirate the e-book. In some cases it is impossible to find a pirated e-book in which cases I will search for a DRM free option to buy. And in the event that I can't find the DRM free option I will resort to an Adobe Digital Editions DRM version (which I will promptly turn into a normal copy). This has worked out well for me and I have a pleasant library of books on my e-reader.
(Unlike the author, I find the idea of e-book "borrowing" to be completely ridiculous (as ridiculous as spotify or netflix). I would rather just check the book out of a library, or outright pirate it. At the end of the day, the author is not making any extra money out of my inconvenience of having a proprietary management software which stores a book locally on my device but doesn't give me direct access to the data.)