• The
very first paintings of Gladys were done before Derek was
hired as the illustrator for his first picture book, Little
Quack. The pictures of Gladys were what convinced
an editor at Simon
& Schuster that Derek was the right illustrator for
the job.
• Gladys
wasn't always a girl. It's true! When Derek first created
her, he thought she would be a boy gorilla, but then he came
to his senses.
• It
takes ten colors of paint to make one picture of Gladys
without anything else around her.
• The
story of Gladys was inspired by two things:

1.
Derek was obsessed with King Kong when he was growing up. The
1976 movie with Jeff Bridges and Jessica Lange came out when
Derek was just seven years old and he has loved gorillas ever
since.
2.
When Derek was a kid, growing up in Ames, Iowa, a full grown
bull (horns and all) escaped from the Veterinary Lab at Iowa
State University and made it's way across town to Derek's
backyard. It charged after Derek, his
friends,
and neighbors for more than half an hour while the authorities
tried to decide what to do. Derek has always wondered where
that bull was going. He decided that it was probably hungry.

• The
author picture on the back jacket flap of Gladys
Goes Out to Lunch is a nod to both King Kong and
Derek's hometown.
It
shows
Derek
painting
a picture of Gladys climbing a tower (the way Kong scaled
the Empire State Building). The tower is the campanile,
a bell tower and landmark in Ames,
Iowa, where Derek grew up.
• In
the very first drafts of the story Gladys Goes Out to
Lunch,
Gladys hated bananas. But it
was eventually changed so that she loved them.

• Derek
doesn't like bananas.

• Derek
actually did two different paintings for the cover of Gladys.
After doing the first, he discussed it with his editor
and the designer at Simon & Schuster and it was agreed
the cover needed to be more
dynamic. Derek did several more sketches and the final
cover ended up being a combination of the two sketches shown
above.
•
Little Quack makes a cameo appearance in the book Gladys
Goes Out to Lunch, but you'll have to look hard to find him.