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Yes, there is only one chapter currently available for that Early Release ebook.
Here's a description of our Early Release ebooks -
With Early Release ebooks, you get books in their earliest form—the author's raw and unedited content as he or she writes—so you can take advantage of these technologies long before the official release of these titles. You'll also receive updates when significant changes are made, new chapters are available, and the final ebook bundle is released.
The final version is expected to be released sometime in March.
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