Does it make you crazy that Halloween candy was on the shelves in August and today, in mid-October, the stores are already showing lawn reindeer? Yeah, me too.

But it’s not too soon to think about Christmas presents, especially as I dream that someone will buy me an Instant Pot for the holidays.

Who am I kidding? I want that Instant Pot now. I can get it on Amazon this very minute and, with Amazon Prime, the shipping is free!

But the holidays shouldn’t be about what I want. I sent an Instant Pot to my oldest granddaughter, whose birthday is this month. She is a second-year medical student at the University of Minnesota. She and her roommates have little time, and Lily is a good cook. She will let me know whether I should get one for myself

For Christmas, each of my grandchildren will get cookbooks, and over the next few weeks I will decide which cookbooks to buy for them. My first choice so far is Bruce Weinstein and Mark Scarbrough’s latest (of 30!) called “All-Time Favorite Sheet Cakes and Slab Pies.”

But instead of waiting until the holidays, get a copy for yourself now. These recipes will make you Santa Claus during the holidays. All use a half-sheet pan (13- by 18-inches) and each pie or cake will feed about 16 to 24 people. Here is just one of the 100.

Key Lime Cheesecake with Oat Crumble

from Weinstein and Scarbrough “All-Time Favorite Sheet Cakes and Slab Pies,” St. Martin’s Press, New York, 2017

For the crumble crust and topping

24 tablespoons (3 sticks) cool unsalted butter cut into small chunks, plus additional for the sheet pan

3 and one-half cups all-purpose flour

3 and one-half cups rolled oats

1 and one-half cups granulated white sugar

1 and one-half cups light brown sugar

1 tablespoon baking powder

1 teaspoon salt

1 large egg white at room temperature

Generously butter the inside of a 13- by 18-inch lipped sheet pan.

Using a handheld mixer or a stand mixer with the paddle attachment, beat the flour, nuts, both sugars, baking powder and salt in a large bowl at medium speed until uniform, about 1 minute.

Add butter chunks and beat at medium-low speed until well blended, about 4 minutes. Add egg white and beat at medium speed until mixture can hold together like dry oatmeal cookie dough when squeezed, less than 1 minute.

Scoop 6 cups of the mixture into the prepared sheet pan using clean, dry fingers to press the mixture into an even crust across the bottom (even to the corners, but not up the side of the pan.

For the cheesecake

1 pound full-fat cream cheese, softened to room temperature

1 14-ounce can full-fat sweetened condensed milk

1 cup fresh lime juice (I use Key lime juice, available in most supermarkets)

One-third cup granulated white sugar

6 large egg yolks, at room temperature

Position rack in center of the oven. Heat oven to 350 degrees.

Put cream cheese, condensed milk, lime juice, sugar and egg yolks in a large food processor or blender. Cover and process or blend until smooth. Pour this mixture onto the prepared crust in an even layer.

Squeeze small portions of the remaining crumble mixture into little oblongs, then crumble these into little stones and pebble across the filling.

Baked until browned and set with a slight jiggle to the center of the pan, about 30 minutes. Cool in the pan on a wire rack for at least 1 hour before cutting into squares.