` ` The Cat in the Hat '' is back in digital form . Yes , you 'll have to make sure your `` Green Eggs and Ham '' does not become spam . Make sure your ` ` Green Dog and Ham '' does not become spam . More than one million print copies of the book have been published .
` ` The Cat in the Hat '' is back in digital form . Make sure your ` ` Green Dog and Ham '' does not become spam . More than one million print copies of the book have been published .