Ralf Siegert's book even with the shortcoming of being in German although soon to be available in English was a truly great book written for collectors by a collector who took a reasonable profit for his effort.It sold 500 copies in a month.IMO Witty is a dealer producing a book to hump up prices to maximise his and other dealers profit and the longer this wondersome tome take to hit the streets the more he and his mates will make .Personally I will stick with Fisher and Ralf as Witty's book in my opinion wont be worth the $200 or so he will charge for it
His SS book was good but not mentioning a lot of RZM makers like RZM 7/72 1942 etc was inexcusable and probably because he didn't have any in stock that neede hyping as rare daggers Getting fed up with the mercenary nature of some in this hobby