Those books are interesting but only really scratch the surface. They are more for general interest than reference.
For GB pre-decimal coins you really need "Coins of England and the United Kingdom", which comes out each year. (No need to get every year as most of the detail remains fairly static.) Here it is on Amazon: https://www.amazon.co.uk/Coins-England-United-Kingdom-2025/dp/1917269005/ref=sr_1_1?crid=1BP3BH96G6F8E&dib=eyJ2IjoiMSJ9.n4edWGlfb0yBRNDiHCBke5TXqasrBgeyFMD1Mxlg1X5FyKMNS5_w0cPGFQTteufUMLUWKZQ7NLwDhuQMSDq7W3yvSt0Vdhzl0QEvg4PFWCnEE7LZYMHuEVoJFPhxn7PS9HyQwSy6F_D1wm6gvN3uLAtRISHccMe9iyK-1czDV-RR0j-8iokTk-Q6lfvgwfyEQbJh_tgEGJ57pCTeIEBxnpMKzvtXBQPNSFJcrPZj5ek.RLeA8d0awh9bFG9pAjuAGOTGTPi2U6cRY13R1oddGLw&dib_tag=se&keywords=spink+coins+of+england+2025&qid=1761917519&s=books&sprefix=coins+%2Cstripbooks%2C218&sr=1-1
For World coins, the main reference books are the Krause World Coins series, but these are telephone directory tomes, one for each century, and I am not sure if they are even still printed. Best is to use the online website https://en.numista.com/ unless you need to get very specialised.