Nick Rozanski, a Solution Architect at Vitruvius Consulting Ltd, talks about Software systems architecture.

He wrote a book with Eoin Woods which you can buy via this link: https://www.amazon.com/Software-Systems-Architecture-Stakeholders-Perspectives/dp/032171833X/ref=sr_1_1?keywords=software+systems+architecture&qid=1553889955&s=books&sr=1-1