Though Krautrock legends Amon Duul evolved into Amon Duul II in the '70s, this 1989 recording features not the former ensemble but a later version including former Van Der Graaf Generator drummer Guy Evans and one-time Hawkwind bassist Dave Anderson, along with original AD frontman John Weinzierl. While many '80s/'90s Krautrock excursions pale next to their '70s predecessors, FOOL MOON consists of five extended psychedelic expeditions that do the legacy proud.

Amon Duul was a German art commune whose members began producing improvisational psychedelic rock music during the late '60s. The group's members released several albums, mostly recorded during a single extended jam session, beginning with 1969's Psychedelic Underground. Concurrently, some of the commune's more musically inclined members formed the longer-lasting Amon Duul II. Both acts proved to be a major influence on generations of experimental rock musicians to come, and are regarded as pioneers of the Krautrock genre.
Forming in Munich in 1967, the collective included bassist Ulrich Leopold, his brother Peter Leopold on drums, and guitarist Rainer Bauer. While the basic lineup recorded a session that year, an expanded lineup of Amon Duul recorded a marathon improvisation in 1968 or 1969, which subsequently formed the majority of the group's discography. Psychedelic Underground and Collapsing: Singvogel Ruckwarts & Co. were both released in 1969, and later reissued under several different titles. A 1970 recording session produced a more focused, folk-influenced full-length titled Paradieswarts Duul, which appeared the following year. Two additional recordings taken from the group's original session, 1972's Disaster (Luud Noma) and 1984's Experimente, were also released.
While membership within the commune and the band Amon Duul was fluid, several commune members with greater musical ambitions decided to start a separate rock group, and formed Amon Duul II -- they saw no reason to struggle for a new name, or argue over the original. The new group was helmed by John Weinzierl, Chris Karrer, and Renate Knaup-Kroetenschwanz, and set to work to produce an impressive debut with Phallus Dei (1969). This was followed quickly by the 1970 double album Yeti, the cover of which features one of the band's roadies.
1971 brought the release of another two-LP set -- Tanz der Lemminge ("Dance of the Lemmings"), a recording widely considered to be the keystone of the Amon Duul II catalog. With stylistic abandon, the album mixed together everything from straight-ahead rock to experimental noodling, all built around a series of science-fiction themes. The band performed with a joyfulness that belied the real seriousness of the experimental work involved.
They continued on this path for several years, continuing to release highly regarded albums that achieved only moderate sales, at best. 1975's Made in Germany (released in two-LP and single-LP versions) found the band making an attempt to present a more commercially appealing side, with little effect on the market. Continuing failure to crack the mainstream eventually brought the band back to its more experimental roots, though not before causing the core unit to fall moribund for a while.
A further spin-off, formed by John Weinzierl under the original name (and also known as Amon Duul UK and, rarely, as Amon Duul III) recorded sporadically in the 1970s and '80s. Weinzierl worked with former Hawkwind member Dave Anderson on a total of five albums (one of which, Airs on a Shoestring, was a compilation drawn from the first two, with additional material salted in), with additional bandmembers coming from all walks of the British progressive/psychedelic scene. For Losung, Weinzierl and Anderson collaborated with the late Robert Calvert, as well as drummer Guy Evans.
Amon Duul II reappeared during the '90s, producing a series of remixes and original material, as well as Live in Tokyo and the intriguing benefit album Kobe (Reconstruction), which focused on material from 1969 and 1971. Members continued to be active with both solo and band projects. EastWest Records Germany released a four-CD retrospective box set in 1997. The '90s renewed interest in Krautrock culminated with the re-release of three of the group's albums -- Wolf City, Yeti, and Viva la Trance -- in 1999. A 2010 reunion effort was digitally self-released under the name Bee as Such, and was eventually given a full release by Purple Pyramid under the name Duulirium in 2014.
(allmusic.com/artist/amon-d%C3%BC%C3%BCl-mn0000020992/biography?1664711739567)