Sherri Duskey Rinker and Tom Lichtenheld's best-selling picture book Goodnight, Goodnight, Construction Site (Chronicle, 2011) — about some hardworking, tuckered-out trucks callin' it a night — is newly available in a digital book app edition (Oceanhouse Media, November 2014).

One by one, Crane Truck, Cement Mixer, Dump Truck, Bulldozer, and Excavator finish their tasks and settle in for some shut-eye. Soothing narration (which can be turned on or off, or you could record your  own) describes, in gentle rhyme, the bedtime routines of each vehicle; for Crane Truck: "Reaching, stretching, lifting high, / He swings the beam into the sky. / He'll set it down right on its mark, / Then off to bed; it's almost dark."



Tap any word in the text to hear it read aloud; tapping on the illustrations also IDs many items in the pictures (including potentially unfamiliar ones: "rebar," "hoist line," "outrigger"). The trucks all have sounds effects: beeping, yawning, laughing, and — my favorite — Cement Mixer's jazzy little ditty to go with his "whirly song" in the text. There's some gentle background motion and zooming in and out of the illustrations, but it's all fairly subdued, as befitting a bedtime book for truck-loving little ones.

Available for iPhone, iPad, and iPod touch (requires iOS 5.1 or later); $3.99. Recommended for preschool users.