The cover art Lupe posted on Instagram is the insignia of the Bavarian Illuminati.
The owl on top of the book is the owl of Minerva, who symbolizes wisdom.

Lupe posted the cover art on his Instagram with the Latin caption Mille Annorum Lumen, which translates to mean “a thousand years old.”

http://instagram.com/p/xNGjycsKfD/?modal=true

The title Dots and Lines refers to the Pigpen cipher, a very basic cryptographic system that uses monoalphabetic substitution to replace characters with dots and lines. Freemasons began using the Pigpen cipher, subsequently called the Freemason’s cipher, in the early 18th century to keep their records of history and rites private, and for correspondence between lodge leaders.

The title refers to Lupe’s ability to communicate with certain listeners. The first Freemasons used the three dots to symbolize the past, the present and the future, but also the three degrees of the blue lodges (entered apprentice, fellowcraft and master).