I believe every Ruy Lopez book has some references to Archangel, there are also couple of books devoted only to archangel
http://www.ukgamesshop.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=chboope043&Category_Code=
http://www.chesscentral.com/Arkhangelsk_Ruy_Lopez_Archangel_Variation_p/arkh.htm
Everything depends on what do you want to achieve, and what is your current chess knowledge.
By using databases, you'd have to learn yourself why certain move is good, and why is bad(even if its not immediately refuted), so there will be a lot of self learning there.
You'd have to know something about the opening already in order to catch some ideas and plans just by looking at the games.
If you want a quicker path with guide along the way, nothing can beat a good book IMO.
Of course that every book is not the same, therefore you should browse the relevant forums, and ask other players what book they recommend.
I playing this as Black unless White plays 5. d3 instead of the "standard" 0-0 then it becomes a free for all but I can not find good studies or game notes on this variation. Any advice will be appreciated.