An ad hoc planning committee of the National Academies of Sciences, Engineering, and Medicine will organize and conduct a public workshop that examines the frontier of twist & stack physics beyond graphene and transition metal dichalcogenide (TMD) monolayers. The planning committee will consist of selected members of the Condensed Matter and Materials Research Committee (CMMRC), potentially supplemented by additional members to provide the necessary expertise to plan and conduct the workshop. The planning committee will develop the agenda for the workshop, select and invite speakers and discussants, and moderate the discussions. A workshop proceedings will be prepared by a designated rapporteur.