Just a quick post to wish everyone a very happy Halloween! A perfect opportunity to dress up, and eat some pure sugar - but this year we are giving one lucky customer the chance to win an Osprey book of their choice.

All you have to do is suggest the scariest, most spooky piece of artwork which appears in an Osprey book. The artwork which we decide is the most hair-raising will win, and the first person to suggest it will receive a copy of any Osprey book that they desire.

The competition will end on November 7.

Trick or treat!