Here are a few suggestions. I picked some of the less expensive titles that I know to be good books(several are Dover books which tend to be cheaper than books from other publishers), and they're available from amazon.co.uk with free shipping. Some are descriptive notation rather than algebraic, but that's simple to learn if you don't know it.
The Art of the Checkmate by Renaud and Kahn (Dover)--focuses on various mating patterns
Better Chess for Average Players by Harding (Dover)--includes a little bit of everything
The Most Instructive Games of Chess Ever Played by Chernev (Dover) --Chernev does a nice job of annotating games in a way that makes sense to intermediates
Chess Master vs Chess Amateur by Euwe and Meiden (Dover) -- another great intermediate book
Capablanca's Best Chess Endings by Chernev (Dover) --includes the full games but emphasises the ending
Simple Chess by Stean(Dover) --don't be fooled by the title; this is a positional manual distilled to surprisingly few pages and not something for beginners
Chess: 5334 Problems, Combinations, and Games by Laszlo Polgar --huge book consisting mainly of checkmate exercises
Thousand and One Winning Chess Sacrifices and Combinations by Reinfeld (the title is actually 1001 Winning Chess Sacrifices and Combinations, but if you search for it that way at Amazon UK, the new book doesn't come up)
I recommended a fairly wide range of types of books, but studying tactics should still be at the top of the priority list at this stage of your chess development. Good luck in your quest for improvement.
I'm based in the UK, and looking to buy some reasonbaly priced chess books to help chess study. I'm rated about 1550-1650 on chess.com and wondered if anyone might have any old books lying around that they may not have a need for anymore. My e-mail is ianpaulyn@binternet.com, if anyone has anthing suitable - ideally looking for a few books, but am open to anything suitable.
Many thanks.
Ian Paulyn