In Search of Space strengthened Hawkwind's science fiction-type brand of progressive rock, gaining bass player Dave Anderson and galactic poet extraordinaire Rob Calvert, while losing John Harrison at the same time. The album opens with the mind-numbing galactic haze of "You Shouldn't Do That," a spooky little 15-minute excursion that warps, throbs, and swirls with Dik Mik's "audio generator" and the steady drum pace of Terry Ollis. Then comes the ominous whispering of the title, set to the pulsating waves of Dave Brock's guitar and Turner's alto sax, with Dettmar's synth work laying the foundation. Wonderfully setting the tone, "You Shouldn't Do That"'s improvisational looseness and rhythmic fusion smoothly open up the album into the realm of Hawkwind. The peculiarity never ceases, as "You Know You're Only Dreaming" and "We Took the Wrong Steps Years Ago" delves even deeper into obscurity, sometimes emanating with the familiar jangle of the guitar which then has its acquaintance overshadowed by the waft of the keyboard. Just as "Master of the Universe" chugs and rolls with a foreboding rhythm, "Adjust Me" retaliates with its moaning verse and tonal fluctuations fading into oblivion. The groundbreaking sound which Hawkwind achieved on In Search of Space helped to open up a whole new avenue of progressive rock. This album would lead to their most successful release in Space Ritual, coming two years after In Search of Space, with their interplanetary groove already set for takeoff.