I have illustrated two picture books of Tony Mitton’s poems. The first one was Gnash, Gnaw, Dinosaur! (published in 2009), but the artwork for the sequel, Rumble, Roar, Dinosaur! (published in 2010) was actually drawn at the same time.
This is because originally the illustrations were all intended to appear in one book. It was going to be called Dippy Diplodocus and other Dinosaur Rhymes. This was how the cover was going to look:
There were some changes at the publishers in the middle of the project, and it was decided to split the project into two books. I had to do a bit of extra drawing and Tony wrote an extra poem, but it proved a great idea: both books work really well.
(Illustrations from Gnash, Gnaw, Dinosaur! and Rumble, Roar, Dinosaur! published by Macmillan)