series highlights new advances in the field, with this new volume presenting interesting chapters on Mesoporous silica nanoparticle synthesis, Periodic mesoporous organosilica, Nanovalves and other nanomachine-equipped nanoparticles and controlled release, Two-photon light control and photodynamic therapy, Biodegradable PMO nanoparticles, Cationic mesoporous silica and protein delivery, Drug loading, stimuli-responsive delivery and cancer treatment, Animal models and cancer therapy, siRNA delivery and TWIST shutdown for ovarian cancer treatment, and TBC (mesoporous silica nanoparticles and cancer therapy or biodistribution of MSN).