Going to buy one for two upcoming Vegas trips.

Which one is the best?

a) Las Vegas Advisor Coupon Book ($40)
b) American Casino Guide Coupon Book ($20)
c) Las Vegas Entertainment Book ($15)

Mostly want it for Downtown, Strip, and Boulder Highway casino restaurants and attractions.
Also, maybe a few match bets/free plays.

Is there another coupon type book I should look into?

Thank you!