I really like Advanced Swift: https://www.objc.io/books/advanced-swift/ https://www.objc.io/books/advanced-swift/ I also visit their workshops and trainings, w

I really like Advanced Swift: https://www.objc.io/books/advanced-swift/ https://www.objc.io/books/advanced-swift/ I also visit their workshops and trainings, whenever possible. I'm a European so it's not always practical to visit the States for CocoaConf and such.