Kevin Horsley

Unlimited Memory teaches the standard mnemonic apparatus, the method of loci, peg systems, chunking and elaborative encoding, drilled rather than merely described.

Horsley holds records in memory competition and the credentials are real. He also writes about attention as the actual bottleneck, arguing that most people do not have a memory problem so much as they never encoded the thing in the first place.

The techniques are ancient, well tested, and work exactly as advertised for anyone willing to do the repetition.