The animal on the cover of Programming Entity Framework is a Seychelles blue pigeon (Alectroenas pulcherrima). Also known as a Seychelles blue fruit dove, this medium-size pigeon is approximately 10 inches long and inhabits the woodlands of the Seychelles archipelago. Its wings, underbody, and tail are dark blue, while its head and breast are a silvery-gray or a pale blue. It has a characteristic patch of crimson skin that runs from its forehead to its crown. Its diet consists mostly of fruit.
The cover image is from Riverside Natural History vol. IV. The cover font is Adobe ITC Garamond. The text font is Linotype Birka; the heading font is Adobe Myriad Condensed; and the code font is LucasFont’s TheSansMonoCondensed.