hi there, I know you have been getting a lot of the plagiarism messages and stuff but I'll say it politely, it's nice that you have taken the James book down but honestly two books cannot have such a striking resemblance until and unless one HAS read the other one, it's not wrong to say that you got the inspiration from that book and thought of writing a similar book which you did not realize on a greater extent is counted in plagiarism when you don't give the author proper credits.
Copying storyline as well as character names and they calling it 'coincidence ' does not make any sense, a simple apology won't hurt and if you really didn't copy "high achievers" you could have talked it out instead of blocking the author