Giles Easterbrook was a composer, publisher, writer, and entrepreneur whose musical interests and tastes ranged widely. From the early 1970s he worked in most areas of musical life, as concert promoter, composer and artist's representative, theatre-music writer, director and manger, performing and composing competition adjudicator, ensemble director and tour manager, panellist, broadcaster, member of several music support trusts, co-founder of the Chameleon Composers Group, on committees of music organisations including WASBE, and the Redcliffe and Park Lane Group concerts. He died on September 1, 2021, and this CD, In Passing, is released, in his memory, on Prima Facie Records, the label he co-founded with Steve Plews in 2005.

In Passing is a portrait of Easterbrook the composer and consists of six pieces performed by major exponents of contemporary music, including Roger Montgomery, David Owen Norris, Ian Mitchell, Huw Watkins and Tritium. The CD takes its title from the five-movement octet situated at the heart of the CD's programme, brilliantly performed by the ensemble Gemini. The booklet includes notes written by Easterbrook himself.

The bulk of the music on this CD was formerly released on Prima Facie (PFCD002), though now long out of print, as The Moon Underwater: Music by Giles Easterbrook. The title track of the original disc is here replaced by Giles' Clarinet Trio, Aus dem ersten Grun.