Aristotle's First Principles by Irwin

[Snafui]

I cannot recall where the recommendation came from for Aristotle's First Principles by T. H. Irwin, and after searching these forums it was not here. Has anyone read this or have some insight on it? For me, so far, it seems a bit off because it's as if he is arguing that for realism to be valid you must validate your arguments before arguing them, i.e. since you cannot validate your perceptions upfront your whole argument is therefore invalid. 

 

I'm wondering if this book is a waste of time... and money.