"Luck is a Puppy Named Schatzi!" is a classic! Poor Schatzi, he was run over by the German planes when they landed at the beginning of the story and then dropped from an airplane at the end. But, before his death, he saves our titular Enemy Ace, who had previously nursed him back to health. Circular karma all around.

But, yes, the Ennis book is great as well as the previous Pratt one.