Hi Dave. How long ago did you give her the book? Although us HD (high drive) spouses probably read it in a day or two, it will take her a bit longer. You have to give her some time. But you also have to be firm. You haven't given us much info on your situation except that you've been married for 10 years and have sex a couple-4 times a year. Any kids? What are your ages? Is your W on any medications which might affect her libido (anti-depressants, b/c pills), has she asked her doctor about her low libido? Have either of you gained a lot of weight?
Affairs are usually not a good answer. What you want is for your wife to desire you.