Found in 1 comment on Hacker News
gendal · 2013-11-25 · Original thread
Hi there,

Probably the best in-depth book on this topic I've read is this one. I'd highly recommend it. http://www.amazon.co.uk/Payment-Systems-Macmillan-Financial-...

(Disclosure: it was co-written by one of my colleagues at IBM)

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