The World Health Organisation (WHO) invites vendors to submit an Expression of Interest (EOI) for co-publishing a series of studies in collaboration with the European Observatory on Health Systems and Polices with a focus on health policy and health systems. WHO will require the successful bidder, the Contractor, to co-publish the series, and would like to develop a partnership with an established and reputable publisher with an appropriate and substantial list of titles on international aspects of health care. The publisher, working with the Observatory, will establish a working relationship to ensure quality, reliability and accuracy of each title of the joint product, and the most appropriate and cost-effective dissemination of the series as a whole. The publisher being sought as a partner for co-publishing should be a trusted and appropriate partner with a credible reputation in the appropriate discipline. Please see the attached EOI document for further information.