A useful pocket guide to the city, with details of the major attractions. Not ideal for accommodation or restaurant suggestions. The pocket Footprint guide to Valencia is a more informative, helpful choice for the city.
A slim, compact guide to the resorts of Gibraltar. Fairly light on general information so for a more comprehensive look at the area, any of the general guides to Andalucia would be a more useful choice.
A pocket-sized, colourful guide with a couple of pages on each resort with top tips on things to do, where to eat and what to see. Every recommendation is marked on a small street plan of each resort. A brief guide but useful and to the point.
Somewhere between pocket guides and full-scale handbooks stands the Travellers series, offering reasonable introductory reading as well as plenty of suggested sights and tours. This Finnish volume is excellent.
A handy little guide to Bilbao, ideal for weekends and short breaks. Doesn't contain quite as much information as the pocket Footprint guide and if you plan to stay a bit longer, the Cadogan guide would be the better option.
A decent short-break companion offering a good flavour of the city, with sightseeing recommendations and a few hotel and restaurant listings. Good photographs throughout but maps are rather underwhelming.