Writing a free book on Ruby

Hello,

I am ruby novice.

And I am writing a free book on Ruby.
And side by side making engaging elearning tutorials on it.

I have already found an Instructional Designer as a mentor.

I am looking for some guru on ruby who is willing to spare some time
and help review the content so that its not technically wrong.

Waiting for your reply.
Regards,
Befria AZ