A trove offering a wealth of insight into the lives of Jews and Muslims.

Friend or foe?

Silk Road merchants’ correspondence.

Abdullah Azzam’s Afghan jihad.

Money and symbols.

The fruits of instantaneous criticism of Israel.

Some of the oldest examples were found in China.

The newly-crowned King Salman is being heralded in the press as a reformer and a moderate. What about his numerous ties to extremist groups, including. . .