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Buy it for £11.43 at guardianbookshop.

Buy it for £13.49 at guardianbookshop.

To buy a copy for £16.71, go to guardianbookshop.

To explore all the books in the Observer’s summer reading list visit guardianbookshop.com. Delivery charges may apply.

Buy it for £22.62 at guardianbookshop.

To order a copy for £12.99, go to guardianbookshop.

Buy it for £7.91 at guardianbookshop.

To order a copy for £7.91 go to guardianbookshop.com. Free UK p&p on all online orders over £15.

To order a copy go to guardianbookshop.com. Free UK p&p on all online orders over £15.

To order a copy for £14.44 (RRP £16.99) go to guardianbookshop.

To order Never Greener for £11.04 go to guardianbookshop.com. Free UK p&p over £10, online orders only.

To order one for £12.74, go to guardianbookshop.com. Free UK p&p on orders over £10.