Perry Rhodan is a 221-book series with 221 released primary works first released in 1961 with contributions by Clark Darlton, David A. Adler, Kurt Mahr, Kurt Brand, K.H. Scheer, William Voltz, W.W. Shols, Karl-Herbert Scheer, Walter Ernsting, Rob Lowe, Perry Rhodan, Carl Roessler, Hans Kneifel, Uwe Anton, Robert Feldhoff, Frank Borsch, and Andreas Eschbach.