This book "ELECTRICAL ESTIMATOR'S MANUAL" is updated from 2005 to 2013 by the Author/Publisher WILLIAM PENN including a free C/D of the book. It is one of the best reference material books which lay flat with a comb binding for the estimators. No confusing language, all written in construction talk for the estimators. This book will also assist the electricians, engineers, and architects the use of the How to Estimate Electrical Construction Projects. Also Included are thousands of installation labor rates, some with visual aspects, pertaining to electrical materials. The author has over 45 years of experience in the construction field as an electrician, foreman, general foreman, superintendent, estimator, project manager, and a partner in an electrical contracting company with over $15,000,000.00 in sales. Within this book is my "About the Author" page for more details. Also included are excerpts from a new 2013 book by Author / Publisher WILLIAM PENN "ELECTRICAL CONTRACTORS PROJECT MANAGEMENT" also listed on Amazon.com.