Whenever you first become a member of the Las Vegas Advisor, you get your choice of which coupon book you want, this year's or next.
If you join early in the year, you'll usually want this year's Pocketbook of Values (POV) coupon book, since presumably you'll be coming to Las Vegas at some point during those 12 months.
However, as the year progresses, sometimes people know they won't make it before the end of the year; then they'll opt for next year's POV.
What a lot of people do is take the current coupon book, then renew their memberships at the beginning of the following year, even if they have a few months left on their memberships.
For example, say you join LVA this month (thus, your membership expires in July 2008). You opt for the 2007 POV, come to Las Vegas in August 2007, and use all the coupons. But then you plan on coming back to Las Vegas in February 2008 and want the new POV. You renew your membership early in 2008 and your expiration date simply moves 12 months forward, to July 2009, and you get the coupon book for the whole year.
Anytime you renew, it adds 12 months to your membership, even though you still have a few months or so remaining on the existing membership.