Joseph Slinker

AppTrack Ninja 上的 App Store 发行商。

作品集包括：

• The Good Chord Book
• The Good Ukulele Book
• The Good (Banjo) Book
• The Good (Guitar) Book
• Photo Fitness Library Cleaner
• Old Testament Reader (KJV)
• Doctrine and Covenants Reader
• New Testament Reader (KJV)
• Book of Mormon Reader
• Longshot Disc Golf
• The Good (Mandolin) Book