CO - Author needed for Mathematics test book

Hello I am looking for a First class level mathematician who will work hand in hand with me as a co-author with me to write a mathematics text book of over 300 pages which will aim to serve West Africa. Specifically I envisage that the Mathematics Textbook will prepare students for the West African (WAEC) Exams. Please refer to the WAEC Mathematics Syllablus attached to this message below to understand what the text book should comprise of in the end. I need you to have at least a masters degree in Mathematics Qualification in order to qualify for this job. In addition to paying you for this job, I may consider putting you as one of my co-authors although this is subject to how much I pay you for the work. Please note that the pay proposed in this advert is subject to a per monthly basis. Thanks very much and I do welcome bids interested freelancers. Regards, Wisdom Enang