If you want a good overall review of technical analysis then search for:
"School of Pipsology" and/or
"Forex Peace Army" (not Forex Peace Army Scam) forexpeacearmy.dot.kom.
Both of these are geared toward Forex trading so they won't have much if anything on using volume. Unless you're interested in trading Forex I'd skip pre-school at the School of Pipsology. For the Forex Peace Army follow your nose to the Learn Tab and then go the Forex Military School and start at chapter 6.
For more on volume, search "Tradeguider Master the Markets" you should find a free e-book by the same name, third edition. You can download it as a pdf. This material is based on work that Richard Wyckoff did with volume and price relationships. I'm more of a Wyckoff purist but the VSA stuff is a good introduction. For pure Wyckoff the best I've found is at the LTG-Trading website.