Metal-organic magnets (MOM) are assembled from metal nodes bridged by organic molecular linkers into extended networks. This gives them a number of advantages over conven-tional inorganic magnets: there is a much wider diversity of organic than atomic ligands; 2 the modularity of their construction allows for tuning of interactions while retaining the topology and their longer lengths facilitate magnetic low-dimensionality, and thus enhanced quantum fluctuations. Perhaps most excitingly, it has recently been demonstrated that redox-active radical ligands can introduce into MOFs both high electronic conductivity (0.45 Scm -1 ) and strong magnetic interactions, despite the long-distances between metal centres. This suggests that MOMs could form the basis for practical new quantum technology. MOM spin chains are now well established as host materials for distinctively quantum behaviour, from spin fractionalisation in Cu(C 6 H 5 COO) and subsequent efforts have uncovered a number of other high-quality model systems. The Haldane phase is yet to be experimentally realised for spins S > 1.