Aircraft: Adult Coloring Book Vol.4 Airplane, Tank, battleship Sketches for Coloring This book is part of the 15 series. This collection of aircraft models will captivate and excite adult Colorists. This Book Contains: - Over 40 aircraft sketches for coloring - Presented in Landscape - Printed on the front of Pages only for easy coloring and displaying. It's time to unwind with one of the most popular relaxation methods available: adult coloring. Find out for yourself just why adult coloring has become amazingly popular. Choose the best picture that suits your day and start coloring.