for the product you want to trade, a good book is 'Options, Futures, & Other Derivatives' by John Hull. It's more academically inclined but explains derivatives quite well and should give you a good picture of the mechanics behind the markets.
for technical analysis, a good book is 'Technical Analysis A to Z' by Stephen B. Achelis. it explains most of the popular indicators used and how to interpret them.
i wouldn't go to a seminar because they are vague, regurgitating text book stuff and usually a waste of time. the two books above are more than enough and if you don't like them you can always return them!