Ahh Steelhead on the Fly! I would suggest the following:
Advance Fly Fishing for Steelhead
by Deke Myer
Steelhead Fly Fishing
by Trey Combs
Not a Fly fishing book but some useful info for a Fly Fly Fisher
Drift Fishing for Steelhead
By Billy Herzog

Also Check out ****son's Web Site @ http://www.flyfishsteelhead.com/
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