Here’s a brief review of the book itself (not the PDF format, which is just a digital copy):
If you’re a true crime completist, it’s worth a read, but start with Helter Skelter first. If you do find a PDF, be prepared for possible quality issues.
It looks like you're asking for a review of the PDF version of Five Down on Cielo Drive — likely referring to the true crime book by (later retitled Five Down on Cielo Drive: The True Story of the Tate-LaBianca Murders ).