as far as i know there is only one good book on the genus pituophis other than the crap from TFH that is OK for nice pictures fut the info sucks for the most part .
here the the bible of the pits .Variations&Relationships in the snakes of the Genus pituophis my Oliver Griffith Stull .
this book is not for the easy sit down and read in one day type of person no pretty pictures at all just facts and info. I have had this book for a few weeks now and still rereading it just to get it all .Hope this helps

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