Time Passages is a collection created as a New Unique Adult Coloring Book Series. They are intended to provide an interesting relaxing and enjoyable pastime. They have been created to provide you with an opportunity to use your imagination and creativity and to have fun. More interesting than the traditional follow the lines coloring books, these unique coloring books for adults provide ample variety of stress relieving design originals, including simple line drawings, scenes and landscapes, grey scale drawings and wire frame drawings. There are opportunities to add your own detail, there are pages that can be completed fairly quickly and pages that can absorb much longer periods. This set of 18 Interesting subjects includes; ' Airplanes and Helos Balloons and Air Ships Birds Buildings, Architecture and Cityscapes Butterflies Cars and Bikes Dogs Fish, Fishing and Sea Creatures Flowers Machinery and Equipment Military Motors and Engines Music Ships Tanks (military) Trains Trucks Warriors