Dear Project Administrator,
To introduce myself, I am a postgraduate linguist. I am sure I am the one who you are looking for to fulfill the job for you.
You are requesting someone competent and credible to rewrite some parts of a book so as to meet the convenience of your book readers. I am competent with academic, formal language and as I am a linguist then I am well acquainted with adapting the text to the desired level to much the understanding of your readers (weather the desired level be very technical, less technical, non-jargonic, formal, informal, etc.).
Best regards,
Hicham EL HORRI (MPhil Applied Linguistics).