Need a Book Writer/Story Writer for children's Illustrative story Books

Hello , I need an expert Book Writer/Story writer for children's illustrative story books. I require a story writer who has good thought process ,ability to write stories for kids of different age groups ,create stories by keeping kids mental ability and interest in mind which can make them read story with fun and interest. Stories summary ,moral should be creative and choice of words should be smart. Also stories must be interesting with the use of different characters like animals,creatures etc which forces to read as per the age of the child.
Topic/outline we will provided by us. Story writer has to conceptualize the story in a way that as per paragraph ,can be illustrated so beautifully according to that interesting part. Rest we will discuss while chat. Thanks