Callanan's work explores apparatuses of power. Gathered here are the responses to his mass letter writing. Each letter poses a deceptively simple question or even inane rhetorical statement and the collected responses

Collected here are a selection of responses to a series of letters mailed between 2004-06, ranging from the bemused response of the Secretary to the Archbishop of Canterbury to the question "When will it end?" to appreciative letters from the offices of President Mubarak of Egypt in response to the declaration "I respect your authority".

Letters 2004–2006: Confirmation That You Still Exist; I Respect Your Authority; When Will It End; One London is published as part of Book Works’ Chap Book Series (No 8), printed offset in an edition of 1,000 copies, full colour, 48 pages, with a soft cover. Designed by Valle Walkley, 240mm x 175mm.

ISBN 978-1870699983
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