Deletion of Kilwa Empire

Comment: ping|Kipala}} Ummm.... https://books.google.co.il/books?id=YXgoDwAAQBAJ&pg=PA33&dq=Kilwa+Empire&hl=en&sa=X&ved=0ahUKEwiL0tvA5aTgAhUTiaYKHSm5DtgQ6AEIKTAA#v=onepage&q=Kilwa%20Empire&f=false this book by https://www.adonis-abbey.com/ Adonis & Abbey Publishers Ltd seems to contain more or less the text in our article. The publisher and http://afrstu.uga.edu/directory/people/dainess-mashiku-maganda author would probably be assumed to be a .... However the textual similarity to our Wikipedia page (including the version created in 2006, the book being published in 2014) seems to be beyond coincidental - despite the book not citing Wikipedia as far as I can tell. Regarding the nomination comment - the article is asserting this empire was mostly in the Persian gulf (despite being named for Kilmwa in East Africa). The book source does present a bit of a pickle
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Cited policy: Wikipedia:Reliable sources (WP:RS)