Dirt - at - any - cost, what does it mean?
Fascinating to the private audience at which each book is aimed , the results are obviously not of the dirt- at- any- cost school of life story.

I cannot get the meaning.

Thank you very much

Question

Dirt - at - any - cost, what does it mean?
Fascinating to the private audience at which each book is aimed , the results are obviously not of the dirt- at- any- cost  school of life story.

I cannot get the meaning.

Thank you very much

Answer

I assume that 'dirt' here refers to information that can be used to smear someone's reputation. It's the same idea  as in 'digging for dirt on someone'. 
So ( also assuming... )  'dirt at any cost' means that they want to find dirt, and are prepared to do anything to find it. I'm not sure if that is referring to the cost to the person that is looking for it, or if that cost is to the person that the dirt is on. e.g. for the 'finder' that could be risking prison for hacking phone messages, or breaking into a house to find incriminating documents. For the 'victim' that could mean destroying their career and/or relationships from having secrets exposed. Perhaps it's both?
Does that make sense?

Answer

Timothy. It's part of an exam text. It must make sense. Thank you anyway for reading it

Answer

That sentence literally makes no sense.

-27 year old native English speaker