I will assume that "In this sentenc e" is an editing error, and that the sentence you're asking about is this one: In "The Grand Design," co-authored with US physicist Leonard Mlodinow, Hawking says a new series of theories made a creator of the universe redundant, according to the Times newspaper which published extracts on Thursday. The use of "extracts" is fine. It means that the Times published short portions of the book.
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