In Karen Katz's Where is Baby's Pumpkin?, a small girl goes hunting for her pumpkin. If that's gone, then how can she go trick or treating?!
As the infant investigates hiding places all over the house, she finds anything but.
There's a friendly ghost. There's a witch's hat. There's the sweetest bats you ever saw; and yay! There's some candy!
Your own little one will be hunting too, as sturdy flaps are lifted to find the pumpkin. Naturally, it all ends well.
Marcy Kelmen's Baby Einstein: Touch and Feel Halloween is even more tactile, as the name suggests. The book is filled with colorful elements, which each yield a different texture, as baby fingers them.
Meanwhile My First Halloween Board Book has it all. There are 36 pages in this DK Publishing special. The beautifully illustrated stories introduce infants to all of the usual personae of the holiday.
In fun ways, it explains all about costumes, candy, and those about to be encountered on the streets, like witches and ghosts. All in ways that can be understood by little ones as young as 12 months old.