Non-Fiction Audiobook Narration

I need a professional and formal narrator for a non-fiction audiobook aimed at the general public.

Requirements:
- Engaging and clear delivery
- Experience with non-fiction material
- Ability to convey complex ideas simply
- High-quality recording equipment

Ideal Skills and Experience:
- Background in audiobooks or radio
- Strong vocal control and diction
- Prior work in professional narration

Please provide samples of previous work.