In this book, "Al -Jahiz" is excluded in all matters of trade of his time. As usual in the remembrance of the jokes in a literary humorous manner that is distinguished by it, it narrates the descriptions of the oddities of goods and the valuable possibility such as precious jewels, precious minerals such as gold and silver, luxurious perfumes and goodness, even slaves and neighborhoods, and the differences between their races that then determine their prices, prey, and predators, and fabric He aimed to make his book a help to those who wish to know the conditions of the market at that time, and the increase in the experiences of the tricks and trade experts.