Thanks for the comment —Author of the book here. As the first paragraph explains, "This book is different from usual books. It does not come finished." The ide

Thanks for the comment —Author of the book here. As the first paragraph explains, "This book is different from usual books. It does not come finished." The idea is to write a living book and share as I go. If you do not want early versions, skip for now and return later. Suppose you like to explore the beginning of data engineering and challenges; you might find the intro chapters interesting. The greyed-out chapters are the ones I'm working on, and I'm planning to publish them later down the road. Regarding the paywall, as mentioned here [1], part 2/3 of the chapters are closed, except for sponsored chapters such as The History of Data Orchestration [2]. I need to clarify what's free and what's not. Thanks for the hint. [1] https://www.dedp.online/subscription.html https://www.dedp.online/subscription.html [2] https://www.dedp.online/part-2/4-ce/bash-stored-procedure-etl-python-script.html https://www.dedp.online/part-2/4-ce/bash-stored-procedure-et...