Prisoners, Lovers, & Spies: The Story of Invisible Ink from Herodotus to al-Qaeda

Prisoners, Lovers, & Spies by science historian Kristie Macrakis traces the long, surprising history of secret writing fluids and the people who relied on them. Using widely reported episodes from antiquity through modern counterterrorism, the book t...

Prisoners, Lovers, & Spies: The Story of Invisible Ink from Herodotus to al-Qaeda
Prisoners, Lovers, & Spies: The Story of Invisible Ink from Herodotus to al-Qaeda
Kristie Macrakis
Prisoners, Lovers, & Spies by science historian Kristie Macrakis traces the long, surprising history of secret writing fluids and the people who relied on them. Using widely reported episodes from antiquity through modern counterterrorism, the book t...

Cookies are Disabled

This website requires Cookies for essential functionality. Please enable Cookies in your browser settings and reload the page.

🌐

Google Chrome (Desktop)

Settings → Privacy and security

Cookies and other site data → Allow all cookies

🦊

Mozilla Firefox

Settings → Privacy & Security

Enhanced Tracking Protection → Set to Standard

🧭

Safari (Mac)

Safari → Settings → Privacy

Uncheck Block all cookies

🟦

Microsoft Edge

Settings → Cookies and site permissions

Manage and delete cookies and site data → Allow

📱

iPhone (Safari)

Settings app → Safari

Advanced → Turn off Block All Cookies

🤖

Android (Chrome)

Chrome → Settings → Site Settings

Cookies → Allow cookies

Reload Page