A few well-regarded options came up:

• Scott Kelby’s Adobe Photoshop Lightroom 3 Book for Digital Photographers — recommended as approachable and practical for beginners.
• Martin Evening’s The Adobe Photoshop Lightroom 3 Book: The Complete Guide for Photographers — suggested as informative, well written, and broad in scope.
• Luminous Landscape video tutorials — a good option if you prefer visual learning.

For a beginner focused on both editing and workflow, a book plus video tutorials is often the best combination: use a book for structured reference and videos to see the workflow in action. If you want the most beginner-friendly starting point, Scott Kelby’s book is a strong first choice; if you want a more comprehensive guide, Martin Evening’s book is also highly recommended.