This was one of my daughter's favorites. The sticker indicates that we bought our used copy at the local annual book fair for $2.00! It was well worth the price, based on the fact that we read it over and over. The two tiny mice of the title investigate the animals that surround them in the world (their field) - rabbit, hare, mole, sparrow, fox, frog, duck, weasel, otter, squirrel, and hedgehog. They don't see the badgers that come out at night, though, because they are sound asleep in their nest, worn out from their adventure and their busy day. Lifelike illustrations and a sweet, simple story.