Currently I don't know how many I may have. I had to replace my HDD in my netbook and everything that was on the old HDD is now inaccessible. I do often save the books to disk and then burn them though. I must have several thousand at least. A mix of PD from Munsey's and PG and some that I bought in epub format from B&N in the past as well as many that I bought from Smashwords via their Summer/Winter sales & Phoenix Pick of course.