You'll be the most popular house on the street.

Wendy's may have just released the hottest Halloween treat of the year — 5-for-$1 Frosty coupon books you can hand out to every ghost and goblin that haunts your doorstep this October (or just buy for days you need a pick-me-up).

Wendy's Boo! Book features coupons for 5 free Jr. Frosty treats — that's a mini-sized Frosty that is plenty big enough for a cool-down sip or dip with some French fries. (Don't knock it until you've tried it.)

Wendy's Boo Books
Photo: Kimberly Holland

Wendy's first started selling Jr. Frosty Halloween coupon books in 2003. Proceeds for the sales go to the Dave Thomas Foundation for Adoption. Since they started, the initiative has raised nearly $40 million for the foundation that helps every child find a permanent, loving home.

For each book you buy, 85 cents go directly to the foundation, so you can smile even knowing you're giving back to a worthy cause while sipping on that tasty Frosty treat.

You can buy the books on the Wendy's app, at their restaurant locations, or on the DoorDash app. Just don't miss your chance — they'll stop selling them after Halloween.