I've looked at the correlation between equity REIT valuations and the 10 year Treasury in previous writings as have other authors. (valuewalk.com)
As for the other two, here are brief explanations for why I believe them: (1) From both internal and external evidence it is highly likely that the writings have passed through many editors, and some probably were compilations of previous writings or even merely sayings. (redeeminggod.com)
Much of the content in those new ebooks — despite the nearly $ 3 price tag — contains previous writings found for free on the Pottermore and Harry Potter Wiki sites. (goodereader.com)