user: What was the first Harry Bosch book called?

assistant: The first novel in the Harry Bosch series  by Michael Connelly was The Black Echo, published in 1992.

user: What is the Mayan Civilization known for?

assistant: The Maya civilization of the Mesoamerican people is known by its ancient temples and glyphs. Its Maya script is the most sophisticated and highly developed writing system in the pre-Columbian Americas. The first Maya cities developed around 750 BC, and by 500 BC.It is also noted for its art, architecture, mathematics, calendar, and astronomical system.
The Maya civilization developed in the Maya Region, an area that today comprises southeastern Mexico, all of Guatemala and Belize, and the western portions of Honduras and El Salvador.

user: What are all the different ways of saying customer lifetime value?

assistant: Customer lifetime value is commonly referred to as customer lifetime value (CLV or often CLTV), lifetime customer value (LCV), or life-time value (LTV).