Is the current leader of the ahmediyya/qadiani sect fluent in arabic? Is he a qualified muffasir?
Current leader? Perhaps this should be asked about the mutanabi Mirza Ghulam whose only contribution to Islamic sciences is his claim to being a messiah/mahdi.
I read his book on Shiasm. Pretty weak stuff. I wouldn't publish it on the site, since it is not up to par with our standards.
I'd say these are the issues with his book:
A- The whole book is poetic filler content and could have been written in six pages as opposed to fifty.
B- The arguments are strong but they're not new, they're very common and basic.
C- There aren't many arguments in the book.
So as I previously said, I wouldn't recommend it but I wouldn't prohibit anyone from checking it out.