39 year old Paul Robinson from Rugby in Warwickshire has been missing since February 21st.
It's believed he has visited both Chelmsford and Ipswich Libraries, where he took out a book in each.
Missing Persons co-ordinator Mick Boissonade said: "Mr Robinson has been missing for nearly eight months now and we are anxious to know where he is and that he is all right, so that his family can be reassured.
"We would urge him to contact someone to let us know that he is safe, or anyone who has seen him or knows of his whereabouts to contact us. We only want to know he is safe and well and if he does not want anyone to know where he is then the information is confidential."
Mr Robinson is described as a white male, 5'7" tall with short brown hair.
Anyone with information is asked to telephone Warwickshire Police on 101 or 01926 415000.