For those interested, my new 'Stasi' novel (the last in a series of crime thrillers set in East Germany) has just been released as a paperback. No mention of Hull City, but Hull itself is central to the plot (as is Dresden ... you can probably guess where that's heading). It's The Stasi Game and you should be able to get it from Tesco, as well as bookshops. Also for a limited period, the Kindle version is just 99p (not sure if this applies to other non Kindle e-books -- a previous one, Stasi 77 is also 99p for a short while). It's set in WW2 and 1982 and for some reason is bedecked in the mid 80s Don Robinson-era Tigers' colours (the cover designer is bizarrely from Hull too but claims it's accidental).
https://www.amazon.co.uk/dp/B085MHZ3CD/?tag=not606-21
https://www.amazon.co.uk/dp/B085MHZ3CD/?tag=not606-21