Acorn Risc PC Manuals, Software and Hardware (CT11)

I am very interested in the Acorn Risc PC and would be most grateful for anything to do with them, books, software and hardware from mice to an actual RISC computer, in fact anything that has this logo on it.
I am particularly looking for the BBC Basic Reference Manual BASIC VI.
Many thanks for looking.
Can you help with this request?
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