Types of Audiobooks:

Human narrated (HN)

produced with voice actors reading the books
Pros:

• more dynamic listening experience

• multiple voice patterns

• different male/female voices

• greater inflection & emotion to connect you to the read. 

Cons:

• More expensive production cost = higher list price

• Takes months to produce

Auto narrated (AN)

produced with Google Technology with artificial intelligence reading the books​

Pros:

• only 1-3 days to produce

• less expensive production = lower list price

• backlist and underperforming book titles will be able to be added on audio due to lower production costs and times.

Cons:

• while AI voice technology has improved, it still misses some of the emotion and inflection that can only be produced with human narrators