What’s in Edinburgh? Well, historical buildings and a lot of nice pubs, really. The Edinburgh Festival of course, but not in February - this is not necessarily a bad deal if you want space to walk around. (And I do mean walk around - a car might be as much hindrance as help, except for the hilly bits, of which there are many.) Buts it’s pretty though. Castle, Palace of Holyroodhouse, and as YankeeBlue said, graveyards. If you ever encountered the faithful mutt story of “Greyfriars Bobby” as a child, now you can visit him, in a manner of speaking. Or walk in the footsteps of Mary, Queen of Scots, or John Knox the well-known ex-galley slave, should your tastes lie in that direction.
Here is, I think, the oficial website.
http://www.ebs.hw.ac.uk/EDC/Edinburgh.html
and a different one
http://www.rampantscotland.com/edinburgh.htm
I hope they can help you find what interests you.
I don’t know about travel books: perhaps you could even wait till you get there, I don’t know.
I don’t know about having time for Loch Ness, but then I suppose at a guess it would be approx. 4 hours drive, so it just depends how energetic you feel with your limited time. Or, if you are a golfy person, you could easily visit St. Andrews (historic buildings, ruined castle etc). but I don’t know what you want to see especially.
It will be quite cold - no need for Arctic gear though, just normal things with a useful pullover or two. Anyway, when it’s cold is when you learn about whisky (and ginger wine.) See, all very well planned.
I’m sure you’ll have a good time. Here is a link to the relevant newspaper for the Edinbrugh area, in case it is of any use.
http://www.thescotsman.co.uk/