This is a repackaged version of Analog Devices' CN0391 example into a standard Arduino library. For more details on the shield and the library itself, see the following article:

• 4-Channel Thermocouple Demo using the Arduino Uno

Moreover, the example read_temps.ino was written by an unknown author. It is the basis for the basicCN0391 header file included in the library. Credit goes to this person/group.