You can subscribe for VIP, allowing you to play as many chapters as you like during your subscription period.

Subscriptions are $14.99 USD monthly. Prices may vary by region in accordance with the App Store Pricing Matrix. Payment will be charged to your iTunes Account at confirmation of purchase.

Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period.  Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal.

Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase.

Purchased subscriptions continue for the duration of the subscription period. Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription.