"Until Tuesday" is a memoir by Luis Carlos Montalvan about his time in the military and his struggle with PTSD. After serving two tours of duty in Iraq, Montalvan returned home with severe physical and emotional injuries. He found solace in a service dog named Tuesday, who helped him overcome his anxiety and navigate his daily life. The book tells the story of their deep bond and the challenges they faced together, including Montalvan's difficulty adjusting to civilian life and the obstacles he encountered in trying to access medical care and support. It is a powerful and moving tribute to the healing power of animals and the strength of the human spirit in the face of adversity.