Good for anyone who does visual arts and has colour matches to do in hobbies, daily work.
This book took an absolute age (2 years) to source. Several sellers had this listed on their web sites as, "In stock", when it clearly wasn't, which is annoying. Several sellers were showing this book on sale for very silly money (100's of pounds sterling). I eventually bought mine for under £10, second hand, in very nice condition. Thank you that seller for their good sense. I'll but from them again.