Everyone is always looking and trying to buy that one magic marble book. The one that has every marble made pictured identified and valued up to date. If it was available, you could not lift it. It would be many thousand pages. Plus marbles are still surfacing that has never been seen before. We recently dug some at Heaton Agate that no one had seen since they were made. Plus the values would be wrong by the time it got published. Some values almost never change and some change in a year up or down. Everyone ask me to teach them marbles. They have a couple days to spend with me learning, LOL. Maybe I could teach them to identify Davis Marble Works marbles, in two days. They were in business about a year and made only about 12 different varieties. More difficult when a company was in business from 1931 to 1986 making millions per week, every week. I have collected Alley marbles for 25 years and I am still finding ones that I have not seen before. Plus I collect all marbles, hand made and machine made plus some stone. Plus anything else the marble companies produced. Like children's dishes, glass animals, gearshift knobs, any Akroware, marble lamps, marble machine parts, any paper work or documents, on and on. Marbles can cover a wide range, over many years, from Roman days until today. The research and study never ends if you want the info. Lots of marble info available today, the most ever in my life. But it will not come looking for you, you have to find it. It takes effort which is time and money. No single magic marble book.