[4] As a result, much of H. P. Lovecraft II was improvised in the studio, with Huston playing a pivotal role in enabling the underprepared band to complete the recording sessions.

[4] The band's singer and guitarist, George Edwards, recalled the importance of Huston's contributions during an interview with journalist Nick Warburton: "Chris came up with a lot of very innovative techniques that prior to that record had not really been used.

"[4] Among the tracks that were recorded for the album were the Edwards-penned compositions "Electrollentando" and "Mobius Trip", the latter of which featured lyrics that music historian Richie Unterberger has described as "disoriented hippie euphoria.

[4] Unterberger has remarked that both of these songs made effective use of the oddly striking vocal interplay and close harmony singing of Edwards and the band's keyboardist Dave Michaels.

[6] The track "Nothing's Boy" featured a contribution from voice artist Ken Nordine,[4] and the cover version of Brewer & Shipley's "Keeper of the Keys" was issued as a single in late 1968, following its appearance on the album, but it failed to reach the charts.

[1] Writing for the Allmusic website, Unterberger has described the album as, "much more progressive than their first effort", although he also noted that it "showed the band losing touch with some of their most obvious strengths, most notably their disciplined arrangements and incisive songwriting.