Tomcat VIP Yes thats the the book... its truly excellent.
Camber you got it for a steal at $35 !
The Spit IIA notes I have are from the Crecy "Pilots notes series". The copy I have is Revised December 1941 issued with A/L.No 19/F incorporated and further amended to A/L 22H,AL 23J and 25K.
http://www.crecy.co.uk/product_info.php?products_id=172
The one on the site you link to is not amended by the look of it.