If you're still looking I can recommend three great books -- all are must haves.:
1). "Technique of film editing" by Karel Reisz.
2). "In the blink of an eye" by Walter Murch
3). "First cut: conversations with film editors" et al
These aren't technical books, but you'll get that with what ever editing program you're using. These books are basically on the philosophy of editing -- what works where. Your real editing skills will come from doing -- developing a style -- but reading these will definitely give you food for thought and send you down the path. You should be able to get all of them on Amazon. Have fun and happy reading.