5G Core Networks: Powering Digitalization Paperback – 22 Nov. 2019

Very good general reference text when you don't want to start with the TS-docs. I think the charging (/5G Monetization) section could have been expanded a bit but that's the 5G rabbit hole I find myself in on a daily basis and if every section went into the required detail it would be probably be 10x the size... Plenty of detail generally to get a good end-to-end understanding of how things fit together.