Ratings are broken into two categories – Overall and value.
The overall quality of a book in content, quality of illustrations ( if it has illustrations) contribution to the body of knowledge it represents, etc.,
The value is for quality of the knowledge imparted, quality of printing, binding and materials compared to value charged.
|Not Fit to use for as Toilet Paper or even to make fun of|
|Decent Written and Somewhat useful|
|Revelatory – Buy multiple copies, get them signed and hold for retirement|
|Extreme Ripoff – consider violence against purveyor!|
|Not Worth It|
|Average, wait remaindered book sales|
|Average median value – buy on Amazon|
|Better than Average|
Any higher – Seek out author and apprentice yourself to them