Introduction. Foreword. Acknowledgments. Cross-functional teamwork: the challenge of involving professionals (D. Tjosvold, M.M. Tjosvold). Working in public, learning-in-action: designing collaborative knowledge work teams (R. McDermott). Organizing knowledge work systems (S.A. Mohrman et al.). Integrators, not generalists needed: a case study of integrated product development teams (J.A. Klein, P.M. Maurer). Varieties of knowledge work experience: a critical systems inquiry into the epistemologies and mindscapes of knowledge production (R.E. Purser, A. Montuori). The socio-cognitive dynamics of knowledge creation in scientific knowledge work environments (R.V. Tenkasi). The importance of team architecture in understanding team processes (J.M. Urban et al.). The virtual team: a case study and inductive model (A.L. Kristof et al.). Knowledge work groups as social groups: illustrations from the volume contributions in support of a cooperative theory of groups (V. Wekselberg, W.C. Goggin). Governing boards: the most important work teams (J. Hautaluoma et al.). About the editors.