Review by Duncan Lunan. Stephen Baxter, “Northland:  Book Two – Bronze Summer”, Gollancz, £14.99, 424 pp, 2011. First published in different form in Concatenation, online, April 2012. Following Book One:  Stone Spring  (ON, 8th February 2026), Stephen Baxter continued the Northland series  (Fig. 1)  with Bronze Summer  (Figs. 2 & 3), still set on the…