Where can your books be purchased?

They can be bought on Amazon, Barnes & Noble, and other online stores.

What age range are your books meant for? 

The books are generally for preschoolers and kindergarteners. Since they are picture books, they can appeal to ages 3-8. Adults can even enjoy them as well.

Are they sold in hardcover?

They are only sold in paperback and ebook. There may be hardcover versions someday, but that's not for certain.