The best affiliate marketing eBook is "The Affiliate Marketing Book" by Chad Tennant. This eBook offers a clear and actionable guide to starting and succeeding in affiliate marketing. It covers topics like finding profitable niches, selecting affiliate programs, and driving traffic. Another top choice is "Affiliate Program Management: An Hour a Day" by Evgenii Prussakov. This book provides in-depth strategies for managing and growing an affiliate program. It’s great for beginners and experienced marketers alike. Both eBooks give you valuable insights and practical advice to succeed in affiliate marketing. Choose the one that aligns with your goals.