How do authors decide which part of novel to read at reading

[RLS]

My debut novel HENNY ON THE COUCH comes out in a few weeks and I'm having trouble figuring out what to read at readings. My novel moves between three pivotal time periods in one woman's life (meaning 3 arcs, as well) and I'm not sure if I should give short bits from each time period--or read only the opening--or perhaps a section which leaves the audience with the most tension ...
Thanks

[MattLarkin]

Go with the tension. You want your audience begging for more so they'll buy the book.

[Jaligard]

I'm still wrapping my novel up, but there's several scenes that I never planned to write. They insisted that they be in the book and really made the characters come alive. Those are the ones I plan to read.