I own Daniel King's Winning with the Najdorf, and was impressed with his writing style and clarity of annotation.
Authors
All 3 are well known chessbook authors who have written
good books. The box set is very good value
for money, but I doubt that any of the three books are
particulary good for your rating level. If you continue
to study you will probably find the content more valuable
some years (months if you work hard?) from now.
Anybody have any input on these particular Authors? I am thinking about purchasing a box set of them.
1) Amatzia Avni
2) Daniel King
3) Tim Harding