This book is also available under the title 'Settlers in Space' and with a different cover. I don't know if this is a first or second edition, replacing or has been replaced by 'Dangerous Frontiers' - my guess is a simple cover change as the cover above is not particulary attractive! I've seen this available as cheap as 4 GBP but marked as 'poor' quality (ie. the odd tear on the cover, marked inside) so shop around for a higher-priced but better quality copy.