Survivors - Terry Nation
Written in the 1970s by well known screenwriter Terry Nation, this is described as "
Survivors of a global plague battle for life on an empty planet. A gripping vision of a post-apocalyptic world..." and ties in with the 1970s TV series of the same name. Don't expect any smart phones or computers here!
He worked on a number of British science fiction series from that period: Dr Who, Blake's 7, The Avengers, and The Champions, amongst others.
Amazon UK £0.99:
https://www.amazon.co.uk/Survivors-g...s=books&sr=1-6
Kobo UK £0.99:
https://www.kobo.com/gb/en/ebook/survivors-58