- Swift - Apple [Apple Ebook]
- Swift programming - Big Nerd Ranch [Kindle]
- Advanced Swift - Chris Eidof and Airspeed Velocity Gumroad
- Functional Swift - Chris Eidhof, Florian Kugler, and Wouter Swierstra [Kindle]
- Functional reactive programming on iOS - Ash Furrow [To buy]
- Obscure topics in ObjC and Swift - Matt Thompson, and Nate Cook Gumroad
- Clean code - Robert C. Martin [Kindle]
- Clean coder - Robert C. Martin [Kindle]
- Code complete - Steve McConnell [To buy]
- Coders at work - Peter Seibel [To buy]