Efficacy of Synchronous, Virtual Cognitive Behavioral Therapy for Insomnia Across Phases of Cancer Survivorship

Inclusion Criteria: 1. Cancer survivor, defined as: 1. (A) history of nonmetastatic, localized or regional, solid or blood malignancy(ies) and completion of primary cancer treatment (i.e., radiation, surgery, and/or chemotherapy). Use of hormonal, maintenance, oral, and immunotherapies is permitted; or 2. (B) history of nonmetastatic, localized or regional, solid or blood malignancy(ies) and current primary cancer treatment (i.e., radiation, surgery, and/or chemotherapy); Use of hormonal, maintenance, oral, and immunotherapies is permitted; or 3. (C) history of metastatic sold or blood malignancy (ies) taking hormonal, maintenance, oral, or immunotherapies to prevent further disease progression. 2. Chronic insomnia (DSM-5 criteria) 3. Age 18 years or older Exclusion Criteria: 1. Self-reported inability to speak and write in EnglishLanguage 2. Undertreated non-insomnia sleep disorder (e.g., sleep apnea) 3. Undertreated epilepsy, undertreated serious mental illness, undertreated suicidality, and/or psychiatric hospitalization in the past year 4. Unwilling or unable to discontinue night shift work