Fantastic in depth resource on Swift, arriving at a good time. Swift is a big, complex language; albeit while still having quite pleasing syntax. Recent additions include support for DSLs in the form of result builders and significant additional features for concurrency.
This book provides a readable, comprehensive take on Swift, going beyond the basics you might find in other resources (such as the official book).
I got the (beautiful) Hardback edition, which is surprisingly reasonably priced from Amazon.
I think it is worthwhile reviewing things, as Socrates maybe said "the unexamined life is not worth living". Here I share some reviews that I think are of general interest. I try to keep things short and focused on what seems like the less obvious aspects. But I write many, many more using an app I made Micro Reviews. Using this app I capture reviews of all sorts of things, like books, films, TV, food, drinks, coffee and more. These reviews are largely intended to be private, notes to my future self. This guides future purchases and serves as a journal of experiences.
Micro Reviews uses Apple's iCloud to allow for data sync between devices, yet making sure your data remains private (unlike in many Apps the developer, in this case me, can never see it). With tags and categories you can keep your reviews organised. You can also search your reviews and export them to a CSV file (so you do things with the data in Excel).
Download Micro Reviews for iPhone, iPad and MacOS. (It is free!)
You can also learn more about Micro Reviews but why not just download it (it is free and a small install size).