Some are free, some are not. But first you've got to trace them !
Just a little help so that you can spare some time to find the official publications your heart desires. Do not forget that many of them are available at our office! You can -of course- click first on the well known http://europa.eu.int/comm/publications/ but -believe us- browsing the proper Directorate General of the Commission (DG) gives excellent results. Publications are not always free though. The free ones can be easily obtained from their website (an e-mail is enough). The more technical and costly ones are to be ordered in Italy to:LICOSA in Firenze: http://www.licosa.com.