This book compiles contributions primarily from young scholars who participated in the Workshop on Complex Analysis, Fourier Analysis, and Operator Theory 2, held in Rome in September 2022. This workshop was funded by the Istituto Nazionale di Alta Matematica (INdAM) and took place at the institute's Rome headquarters. The research topics addressed during the workshop encompass areas such as complex analysis, Fourier analysis, and operator theory, with significant connections to complex geometry, the spectral theory of canonical systems, applications to frame theory, and thus, signal theory.