The Front Cover depicts the catalytic prowess of open-pore H-ZSM-5 zeolites in converting bioalcohols (methanol and ethanol) into biofuel. In their Research Article, C. Wattanakit, A. .C. K. Yip et al. presented the effect of postsynthesis fluoride etching on the creation of mesoporosity in small and medium pore zeolites like FER, MOR, and ZSM-5. They explored how these zeolites retain their structural integrity and acidic properties, thereby achieving successful hierarchical structuring. Conversely, their research also portrays the adverse effects of fluoride etching on large pore zeolites like FAU, illustrating the breakdown of its microporous framework. The study underlined the nuanced interplay between zeolite framework, etching process, and catalytic efficiency. More information can be found in the Research Article by C. Wattanakit, A. C. K. Yip et al.