I always expect the cover not to be there on the ebook download. I start with the cover. First, I right-click on the cover shown on the post and save it as Book Title Cover.jpg or .png, with every word of the title capitalised and with minimal punctuation -- no commas, semi-colons, dots and dashes -- for search purposes. This approach is called "capped dot-light" in journalism. Book titles on this site are not standardised. Some are capitalised. Some are even in lower-case. Most are a mixture. I apply this method from the music industry which capitalises every word in song titles, often banal catchphrases, to distinguish them clearly as titles. I usually omit the sub-title and may even shorten the title if it contains keywords. Simplicity and clarity is key. Then I download the ebook. I'm interested only in the cover and the ebook. I do this just in case I read and like the book, and decide to post a summary and review on my website -- for which I also need the cover. This is important especially for conference proceedings. I then copy the title from the cover jpg or png and use it to name the ebook. I create a folder, paste that same cover title to name the folder, and move both the cover and ebook files into that folder to group them. I employ a slightly-different naming convention to distinguish audio files, movies, and courses.