Reference works

A Little History of the World

E. H. Gombrich i Clifford Harper

The Wild Flower Key

Francis Rose

Flora Britannica

Richard Mabey

Britain's Spiders: A Field Guide - Fully Revised and Updated...

Britain's Spiders Lawrence Bee, Britain's Spiders Geoff Oxford, et al.

The IVP Bible Background Commentary: Old Testament

Mark W. Chavalas, Victor H. Matthews, et al.

The New Penguin Atlas of Medieval History

Colin McEvedy i David Woodroffe

The Penguin Dictionary of Symbols

John Buchanan-Brown, Alain Gheerbrant, et al.