“Most people with insomnia have difficulty either falling asleep, known as sleep onset insomnia, or _26. asleep, known as sleep maintenance insomnia," Silberman writes in her book, which provides readers with information on insomnia and strategies to_27. it and sleep better. People with insomnia also might feel moody or fatigued during the day. The most common type of insomnia is conditioned or _28. insomnia. Initially, a person starts sleeping poorly because of a stressor, Silberman writes. Then the _29. sleep almost becomes routine because you continue to 30. about your sleeping problems, leading to increased arousal before bed. This then becomes “a conditioned physiological response that contributes to difficulties falling asleep."