Also from the UK:
https://www.amazon.co.uk/Wicked-Beyond-Belief-Yorkshire-Ripper/dp/0007450737/
https://www.amazon.co.uk/Manhunt-Brought-Serial-Bellfield-Justice/dp/1786065711/
Killing For Company The Shrine of Jeffrey Dahmer, both by Brian Masters.
My favourite is Wicked Beyond Belief. The Hunt for the Yorkshire Ripper by Michael Bolton.
https://www.amazon.co.uk/dp/0007450737/ref=cm_sw_r_cp_apa_fabc_n5U7FbC1CXNS5