"Invested Stayers: How Teachers Thrive in Challenging Times" features chapters co-authored by PK-12 teachers and postsecondary teacher educators from across the U.S. that reflect how they persist, remain, and thrive in the teaching profession. Premised on the idea that co-authors are colleagues and mentors to each other, this book conceptualizes contributors as invested stayers in the education profession. Chapters feature how particular catalysts, or landmark changes in education, have been productive sites for growth, agency, and even resistance across the arc of contributors' professional lives. The book recognizes that teacher educators and teachers persist because of multiple and overlapping factors between our professional and personal lives, including the relationships we develop with each other as colleagues and mentors in our professional learning. In the public sphere, PK-12 educators increasingly face challenges that limit their ability to initiate their own professional learning. In this book, we considered what might occur if educators had space and time to write together and reflect on how they've persisted. These authors narrate themselves as invested stayers who invite personal and professional growth through inquiry, creativity, and innovation.