Hi!!
First of all, thank you so much for using my title suggestion... It makes me super happy!! I am so glad that you liked it!
Secondly, to make a book cover what I usually do is find a suitable image off the internet and save it to my pictures. Then, I personally use the website www.picnik.com to photoshop it and add a title to it! I highly suggest that you use that website, it's awesome and easy to use! Then after you save the photo, go to 'My Works' and click on add a cover... or something like that, just hit 'browse', and your documents should come up. Just double click on the pic you want to use and BAM you have a book cover!! I hope this helps!! And if you have ANY other questions let me know!!