Authors interested in building book apps for tablets and mobile devices can download the currently free Demibooks Composer tool in the Apple App Store, a DIY app that helps writers add “realistic physics, animation, sounds and visual effects” to their books.

We caught up with Demibooks founder Rafiq Ahmed to get DIY advice for children’s authors looking to create interactive children’s book apps. If you want to learn more, join us at the Publishing App Expo in December 7-8, where Ahmed will be part of our “App Building 101″ session. For writers on a budget, you can register for a one-day pass or a one-track pass to focus on the DIY part of the conference.

Below, we’ve collected three pieces of design advice from Ahmed–check out the Composer User Guide (PDF) for more information.

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