Teaching is one of the most emotionally demanding professions in the world, yet no one talks about it. The quiet exhaustion between classes. The weight of holding students' lives. The constant, invisible work of managing a room's emotional climate while keeping your own feelings carefully in check. These are the realities teachers carry every day, rarely named and almost never supported. I Didn't Sign Up for This exposes the hidden emotional labor at the heart of teaching - the exhaustion, the weight of responsibility, and the invisible work teachers carry every day in systems never built to support them. Grounded in research and lived experience, this timely and compassionate book reframes burnout not as personal weakness, but as the result of unsustainable conditions. A validating mirror for teachers, and a vital wake-up call for school leaders and policymakers, it makes the case that emotional sustainability isn't a luxury - it's the foundation of effective teaching and student success.