Trolling for walleyes is so much more than just tossing out a couple of lures and dragging them behind the boat waiting for the fish to bite. It takes precision in the presentation to be effective. You want to know precisely how deep the lures are running in order to position them in the appropriate fish zone. One of the best tools a walleye troller can have is the book "Precision Trolling" by Dr. Steven Holt. This book is the walleye trolling bible. It has charts that layout diving depths of the top walleye crankbaits with various lengths of line, tips on trolling with planer boards and diving discs, even a conversion chart showing you what depth your lures will run when using FireLine instead of monofilament. For information, or to get a copy of the book, call 1-800-353-6958, tell them you found it on Walleye Central. You can also order online using our encrypted Secure Order Form.