A conceptually ambitious, empirically grounded and refreshingly readable account of how knowledge moves, mutates or stalls between worlds. Infrastructure is brilliantly deployed, both as analytic and as material relations that facilitate or impede movement. The book illuminates the hidden labour of transfer, speaking to scholars and practitioners alike. Penelope Harvey, The University of Manchester Like other things that people make, knowledge needs infrastructures to move reliably. But travel reshapes things, leaving knowledge potentially fragile or even disunified. This book takes a fresh look at how standards, routines and procedures, strengthened with alignment work, relationships and emotional labour, allow epistemic objects to be translated across cultures and contexts. Knowledge, this book neatly argues, is not a stable entity at all, but a temporary accomplishment sustained through work. Sergio Sismondo, Queen's University, Canada