Found in 1 comment
imdsm · 2018-04-15 · Original thread
I haven't read it, but I have read some of the Very Short Introduction books, and they're pretty good for a layman.

https://www.amazon.co.uk/Viruses-Very-Short-Introduction-Int...

Update: looks like there is a new version published last month, https://www.amazon.co.uk/Viruses-Very-Short-Introduction-Int...

View this Book on Amazon