Usually, it's damage from a physical injury or disease. 1  Cancer and other tumors can cause nerve pain. 2  HIV can cause painful nerve damage. 3  Diabetes is a common cause of nerve damage in the U.S. Over time, high levels of glucose in the blood (blood sugar) can injure the nerves.
Re: Title on spine. Minimum page count is 140 pages, according to CS. I have one book with a total of 158 printed pages and 2 blank pages that has a printed spine. I added 1/16 inch on each side of the spine to keep it from bleeding over onto the front or back covers. Worked perfect.
You also have the option of formatting your ebook in HTML 5 and CSS (but you will need some experience in using these). You can upload your Word file to Amazon and have it available as a Kindle ebook. You need to create a separate cover image (Minimum of 625 pixels at shortest side and 1000 pixels on longest side. Best quality is 2500 pixels on the longest side), and the format should be TIFF or JPEG.