Judith Rossell studied textile design in Scotland and worked for a cotton spinning company before finding her true calling as a full-time illustrator. Judith rendered the scenes where Oliver is at home in pencil and watercolor. Then she used collage and colored crayon to create a mixture of Oliver's own artwork and various things from his life, such as the broccoli trees. Bits of graph paper and bits of brown paper were used to resemble the parts of the cardboard box for his submarine. Oliver was inspired by Judith's brother's little boy, who is into everything and, according to Judith, is just exactly the way her brother used to be when he was little. She lives in Melbourne, Australia.

Judith Rossell studied textile design in Scotland and worked for a cotton spinning company before finding her true calling as a full-time illustrator. Judith rendered the scenes where Oliver is at home in pencil and watercolor. Then she used collage and colored crayon to create a mixture of Oliver's own artwork and various things from his life, such as the broccoli trees. Bits of graph paper and bits of brown paper were used to resemble the parts of the cardboard box for his submarine. Oliver was inspired by Judith's brother's little boy, who is into everything and, according to Judith, is just exactly the way her brother used to be when he was little. She lives in Melbourne, Australia.