Amy Kaufman wrote a book called "Bachelor Nation: Inside the World of America's Favorite Guilty Pleasure.
Kaufman's books goes behind the scenes and details the process contestant undergo to get on the show.
"Once a potential candidate makes it to the audition stage, she is flown to Los Angeles where she undergoes psychological questionnaires, interviews... , [meets] with... on-site therapist, and... a medical exam." Uproxx