 To address this important clinical issue, the proposed randomized clinical trial RCT will attempt to assess the efficacy of Cognitive-Behavioral Therapy for Insomnia CBT-I versus a Sleep Education control in Veterans with insomnia and a history of mTBI. CBT-I is recommended by the American Academy of Sleep Medicine for treatment of chronic insomnia and has also been adopted by the VA within an Evidence Based Practice roll-out program. Despite the acceptance of CBT-I as a first line treatment for sleep disturbance, there are no published RCTs evaluating CBT-I in mTBI patient populations. Therefore, this proposed investigation will address this gap in the literature by assessing the efficacy of CBT-I in Veterans with history of head injury. 