I keep saying, I should write one :-)
For a Four Year Old...
THere is always: We're Going on a Bear Hunt by Helen Oxenbury (Illustrator), Michael Rosen ...that is about the only one I can find: However, 4 is very young: Even the "3 bears" can be twisted into a hunting story: For Older Readers, any outdoors book, I especially like "Born to Pull" is a great read...4 is before my expertise level....sorry...How about Pat McMannus books and read the funny, colorful stories to your youngster!
Glad to see you are looking.....