Are paid book reviews and promos really efficient?

Posted by Isabelle Esling
10
Jun 28, 2016
38 Views
I mean...it is realy worth the money? Does it affect book sales after a while? Can you testify of their efficiency?
Comments (2)
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Isabelle Esling
10

published author-certified teacher-

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Warren Contreras
14

Old Retired Guy

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