During his career, spanning a period of more than 50 years, Nobel Laureate (Chemistry) Glenn T. Seaborg published over 500 works. This volume puts together about 100 of his selected works. The papers are divided into four categories. Category 1 consists of papers which detail the discovery of 10 transuranium elements and numerous heavy isotopes of especial importance. Category 2 papers decribe how the discovery of a number of isotopes became the workhorse of nuclear medicine or found other applications. Papers in category 3 describe how the chemical properties of transuranium elements were originally determined, how chemistry is applied in nuclear sciences and other chemical investigations. Lastly, papers in category 4 show how chemistry is used to elucidate nuclear reactions in the domain of low, intermediate, and high energy nuclear physics.