Note: This publication series by British publisher Planet Three comprises at least 45 titles according to The British Library and other sources, the non-eligible non-genre titles are omitted here. On all copyright pages there is the same ISSN No. 1741-749X that indicates a serial publication. The number line '9771741749015' besides the bar code on back cover is not a valid ISBN and appears on every copy of this publication series. [seen on different scans] A 2-digit number above a second smaller barcode on back cover means the issue number. On all back covers: "£2.50 (€3.70) each when purchased with The Daily Express. Not to be sold separately."