Obviously the Las Vegas Advisor members rewards book is a good choice at $37 Another "not so ugly" coupon book is from Las Vegas Perks. It contains approx thirty 2for1 shows, a half dozen dining discounts and a dozen tour/attraction coupons. All are printable when you buy. I have used them before [under the former name Casino Perks]and never had any problems Go to https://www.casinoperks.com/ The site lists the coupons and is also the ordering page. The price is $29.95 when you enter the offer code at the top of the page....promo code =22.
The 2013 American Casino guide is really good....you can get it from Amazon.com for like 12 bucks........its got tons of coupons for Vegas plus other casinos around the country. Cheapovegas.com has a listing of all the coupons they carry.
Both Coupon Books' (ACG and MRB) value is expanded greatly by having a rental car. Its hard to say which is better as it largely depends on what coupons you plan on using. Both books list all of their coupons so you should be able to see which ones you might use and do the math accordingly.
If you are mostly looking for food and entertainment you might be just as well served by using the "Tix-4-Tonight" outlets which will give you more selection to choose from than the coupon books for both food and ent.