Nathan Kozyra is a US software engineer and Manning author, co-author of Go in Practice alongside Matt Butcher and Matt Farina. His writing focuses on the recipe-style patterns that show up when shipping real Go services in production rather than language-tour material.
His CourseFlix listing carries Go in Practice, Second Edition. Material is paid and aimed at Go developers ready to move past the language tour into the patterns that recur in production code.
For a broader Go syllabus on CourseFlix, see the full Golang category page where this book sits alongside material from Bill Kennedy (Ardan Labs), Thorsten Ball (interpreters / compilers in Go), and the wider Go teaching community.