Tetragon, successor of Trikolon, were founded in Osnabrueck (Lower Saxony) in the spring of 1971. They released their first and only LP, "Nature", in that very year. It came out as CD on Musea in 1995. At the end of 1971, Tetragon recorded in a Hamburg studio five long tracks in their well-proven style for their second LP, the release of which, however, failed. Fortunately, the master tape has survived until the present day, so that now, 39 years past schedule, the work was released on LP. Three of the five songs have been written by the band itself, one by Eddie Harris ("Listen here") and one by John McLaughlin ("Dragon song"). The two latter ones had already been interpreted by Brian Auger. Especially remarkable are Hendrik Schaper's exceptional play on keyboards and Juergen Jaehner's hot guitar play. The other two, however, are their equals in skill and talent. The LP edition is a limited edition of 1000 numbered copies and comes with a four-page colour insert in LP size, including a detailed band history in German and in English language, band photographs, discography with cover and label repros etc.