Buy now to get the key takeaways from Daniel Schulman's Sons of Wichita.

Sample Key Takeaways:

1) Fred, the father of the Koch brothers, was a pioneer in the oil industry. He established Winkler-Koch by buying a one-third stake in an engineering firm in Wichita in 1925. The company later grew into Koch Industries.

2) Fred and Mary Koch were wed in 1933 and their first son Frederick was born. In 1935, a second son, Charles, followed. In 1940, Mary gave birth to the last of her children, fraternal twins David and Bill.