Salt by Mark Kurlansky is about the history and uses of salt. Today salt is cheap and easy to buy, but it was not always so. The ancient Chinese developed salt production and financed much of their government through salt taxes. If you can control salt, you can control much more. The British had a firm grip on India's salt which is why Gandhi staged a salt march as a protest. If you like history and politics you will enjoy Salt.
Salt can do much more than make food taste good, it also can preserve food. Before the 20th century and refrigeration, salt was widely used as a preservative. The history of salted food was my favorite part of the book. Read Salt and you may find yourself making sauerkraut.
Salt production is fascinating. It was needed, rare and valuable. Its value led to many creative methods of production. Most of the methods involve evaporation. Some salt is mined. Many different ways have been used over time. The end result is many kinds of salt for different uses. There is more to salt than table or sea salt.
This is a fun and enjoyable book. It has remained popular for over 10 years. The reason I waited so long to read it was I never thought salt could be interesting.