The Alkaloids: Chemistry and Biology, Volume 94, the newest release in a series that has covered the topic for more than 60 years, discusses key aspects of alkaloid chemistry, biology and pharmacology. Sections in this release include chapters on topics such as guanidine alkaloids from marine sponges, the chemistry and biology of imidazole, oxazole, and thiazole alkaloids, quinoline and quinazoline alkaloids, pyrazole and indazole alkaloids, and Stemona alkaloids, offering valuable insights into their structures, biosynthesis, and biological activities.