Pro iOS Persistence: Using Core Data (2014)
Chapter 2. Building Data Models
Chapter 4. Attending to Data Quality
Chapter 5. Integrating with the User Interface
Chapter 6. Versioning and Migrating Data
Chapter 7. Transforming and Encrypting Data
Chapter 8. Talking to Services: iCloud and Dropbox
Chapter 9. Tuning Performance, Memory Usage, and Multithreading