Bradley Trevor Greive has put together animal photos with a snappy text to create a helpful book for elementary-aged children.

His purpose is straight-forward:  he wants children to know what a "blue day" is and to recognize that everyone (maybe even these highly photogenic critters) has a blue day once in a while.  He illustrates some typical causes: feeling grumpy, lonely, or tired; being embarrassed or picked on; or simply just feeling out of place.

But Greive doesn't stop there.  He wants c...
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