This book provides a quick practical reference and guideline for drafting contractual letters saving time for Contractors. This book will be useful to commercial managers, contracts managers, project managers, quantity surveyors working on construction projects internationally for use with FIDIC Conditions of Contract for Construction for Building and Engineering Works, First Edition 1999 called the Red Book. The letters are arranged and written in the order of clause numbering in FIDIC. Although the book is written mainly for Contractors, the book will be of use to subcontractors, construction industry professionals and students as well.