One of the best travel guides is the EyeWitness DK Lisbon Travel Guide/Book. Check below the link at kdigo.org with a PDF download of the famous travel guide for Lisbon, with 194 pages of relevant information about the city. The book is also available on google books for download as ebook.
Disclaimer: We do not host any PDF files. Please buy the book if you consider it contains valuable information for your trip. Direct link to buy the book on amazon: http://www.amazon.com/DK-Eyewitness-Travel-Guide-Lisbon/dp/0756694825