This is an experiment in collaborative and interactive learning being run at the Springer Nature Lisp Club at lunchtime every Thursday.
Inspired by previous learning experiences, we're writing a book called Common Lisp by Example using Go By Example as a template.
None of the contributors are well-versed in Common Lisp, but we feel that the project of writing a book will help guide our learning, allow us to collaborate, and provide a document of what we've learned.
The book is currently published as a website (commonlispbyexample.com) and as an epub.