From the Boston Business Journal:
Vapor Communications, the Cambridge-based tech startup that debuted a technology last year allowing users to add scents to text messages, has come up with a way to add smells to e-books.
“The first e-book to use the technology was created in collaboration with Melcher Media, and is named “Goldilocks and the Three Bears: The Smelly Version.” Goldilocks is made with fruit scents and is designed to guide kids to the extent they pay close attention to the delicious smells of apricot, citrus, and passion fruit and crave fruit over unhealthy foods as published research suggests that smelling fruit inclines us to eat fruit, according to a release.”
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Note: Variations on this idea have been around for a long time. Two examples. If you were a kid in the mid-1970s you likely remember the scratch and sniff craze. Before that (1960) there was the short-lived idea (very short) of Smell-O-Vision for movies.