The current estimate of revenue generated from publishers selling textbooks direct to students in the UK is £200 million. Publishers are therefore extremely cautious about making e-textbooks available, free at the point of use, through the university library, in case it cannibalises print sales. During the course of the project, the impact on the sales of the print equivalents of the 36 e- books licensed and made freely available to all UK higher education intuitions has been monitored. The data we have suggests that the availability of the e-versions has no impact on the print sales and that, certainly at the moment, e-textbooks are a back up to the print and will co-exist. JISC Collections is encouraging publishers to think of e-textbooks not as a threat, but as a new and different market.