Upper right - Little Polar Bear, Take Me Home! written and illustrated by Hans de Beer published in 1996. Lars, the little polar bear helps a tiger named Sasha who is lost at the North Pole.
Lower right - Little Polar Bear written and illustrated by Hans de Beer published in 1987. From book summary, " While hunting with his father, a young polar bear drifts out to sea and ends up in a jungle where a friendly hippopotamus helps him return home."