Instruct: Classify Amazon reviews into positive or negative sentiment
Query: In depth look at Fenton patterns over a 40 year period

Gorgeous 336 page full color book of the major Fenton patterns made during the period. This volume obviously required a tremendous research effort to compile. Divided into 4 main chapters: Coin Dot, Crests, Hobnail, and Spiral Optic. Chapters are then divided into the colors produced. An interesting historical synopsis of the company's activities is presented for each of the years. Excellent, concise descriptions with full color very sharp photographs and estimated values makes the book a delight to use. A very useful identification and value guide for this highly collectible item.