Professional Case Study E-Book Writing

I need a skilled writer who can produce a series of e-books that read like premium case studies for an audience of advanced professionals. Each e-book must blend solid research, real-world examples, and clear takeaways, all presented in a polished, authoritative tone... (Budget: $15 - $25 USD, Jobs: Business Plans, Case Study Writing, Content Writing, Copywriting, Editing, Ghostwriting, Research, Technical Writing)