Maintenance for the week of August 3:
• PC/Mac: No maintenance – August 3
• ESO Store and Account System for maintenance – August 4, 5:00AM EDT (9:00 UTC) - 4:00PM EDT (20:00 UTC)
I don't know, but I can tell you that there's no point in buying one. MMOs change with every update, sometimes dramatically, new content is added. A guide for ESO on launch day would be completely useless now. Even a guide from February would be. So just stick to frequently updated online resources or ask on forums if you want in-depth info.