A long book means a large file size, and that can be problematic when you're waiting for a book to fully load in your e-reader. Similarly, some books are exceptionally long encyclopedias again spring to mind. Perhaps it's a series of books like the Lord of the Rings trilogy, or maybe it's a reference guide such as an encyclopedia. Some books come in multiple installments. So, without further ado, let's take a look at some of the best hidden Calibre features.ĭownload: Calibre on Windows, Mac, and Linux Sadly, many of those features fly under the radar, which is a shame because they can elevate your ebook management to the next level. It ticks all the right boxes: it's free, there aren't any ads, and it boasts a vast number of powerful features. Calibre might not be the most polished app in the world, but it's definitely the best software for managing your ebook collection.