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I was distressed to find that someone called George Duckett appears to be (trying to) cash-in on stack exchange by selling things like this.
I understand the terms of the license we publish our work under, but what I see here does not contain proper attributions (and links) to where the material came from or who produced it. There is a copyright page at the back which may or may not spell out the creative commons license, but since I can't see it, then it may as well not exist. In other "books", such as the one lifted from Astronomy SE, there is no mention of the creative commons license on this page.
I left a review pointing out that all this material is freely available and searchable already. The book adds no value and is at the very least morally questionable.