Product work needs many specialists; when they stay in silos, products suffer. Bloom argues for T-shaped skills — deep expertise in one field plus enough lateral insight into neighbouring disciplines to collaborate. Using NHS multidisciplinary teamwork (where lateral learning affects patient outcomes) and her own path as a UX consultant and practising physiotherapist, she shows how knowing a little about a lot improves product outcomes, team working and careers — "T-shaped skills save lives (and products)."