Charm is not a quality that Martin Booth's poetry offers nor, I imagine, would he be flattered by any suggestion of its presence there; but … Extending Upon the Kingdom is a vigorous, always interesting collection, and at least half-a-dozen of the poems carry a strong sense of real experience observed with clarity and expressed with force and unwavering truthfulness. (p. 160)

Vernon Scannell, in The Times Literary Supplement (© Times Newspapers Ltd. (London) 1978; reproduced from The Times Literary Supplement by permission), February 10, 1978.