Black Pearl

I have the Kindle book on my Wish List at Amazon being a Kindle fan. Downloaded Paint Net v.4 Beta today. Already played around enough to know I like it. I've deleted Gimp as its menu is too small to read on my Surface Pro 2 (convert from using Mac since early 1990s) but Paint Net's menu is very readable and I love the layout. Will there be an update to the book for version 4? Secondly, am I correct in thinking that the present book will work just as well with version 4 as it does now with the present one? Thanks.