Can you learn how to be a writer from reading someone's abandoned work?

Maybe.

David Macpherson writes every day and has published 180 ebook titles. Some of them are quite good. Some do not reach the end.

There are a lot of reasons why pieces are not completed. This book has a half dozen unfinished works with an introduction that attempts to explain why it didn't work out.

Some of the work is fun. Some of it will help you realize that mistakes happen. This book is worth the time. Learn from the things that don't work out.