Calibre: e-book management

It seems sometimes that there are a myriad of e-book publishing formats, so what happenas when you buy device 'A' and try but fail to read an ebook in format 'B'? The answer? You download Calibre, which is a free open-source e-book library management application, that amongst a wealth of features, will convert from a huge number of formats to a huge number of formats and can automatically detect/create book structure, like chapters and tables of contents. It can also insert book metadata into a "Book Jacket" at the start of the book (I've taken this directly from the calibre website, - go there and read more). Calibre looks to be an indispensible tool for owners of e-reading devices, and it's free. What are you waiting for?