# Passbook App Development for iOS How-To My first published book was a small, focused book on adding [PassKit](https://developer.apple.com/documentation/passkit) functionality (which was newly released at the time) to an iOS app. Published by [[Packt Publishing]]. [Link to buy on Amazon](https://www.amazon.co.uk/Instant-Passbook-App-Development-How/dp/184969706X) ![[passbook_cover.jpg|Passbook book cover|230]]