Michael Backman: Art History & Material Culture treats collecting as a subject in its own right, and it does so through conversation. Michael Backman runs a gallery in central London. He says plainly that he came to the business as a collector first. The people across the table share that instinct. Paul Bromberg lives in Bangkok, has run a consulting business there and is a contributing editor to Arts of Asia magazine. In one exchange he and Backman take turns telling the stories behind favourite objects, and Bromberg starts with a silver water pot. One of the best stories involves a colleague at the gallery named Sarah. She was watching a regional UK auction online for a different lot when she recognised a group of Malay beads from a book and bought them. The teller calls it probably the biggest collection of those beads anyone has seen. The pair also give practical advice. If a piece excites you, step back, do some research and try to see it a second time before buying. Collect too narrowly and the collection may be impossible to sell. Collect broadly around a topic and it keeps its value. They also discuss how the gallery started out as a largely internet-based business while always keeping physical premises, and how offering refunds made buyers comfortable paying for expensive pieces online. Sarah Corbett joins for two quite different subjects. One is African currency objects: pieces that look like blades, spades or hoes but were elaborated until nobody could use them as tools, so they served only as money and eventually came to be seen as art. That talk ends on a lighter note, with a stated preference for a set of iron crosses over a Bitcoin. The other is curiosity, which Backman presents as the reason people keep collecting throughout their lives: they are still learning. Narisa Chakrabongse, a publisher, writer and founder of River Books, provides the show's most personal material. She is a descendant of King Chulalongkorn, whom Backman describes as a great moderniser and reformer, and the conversation covers her English mother, her father the prince, and a royal title that she explains has no neat European equivalent. Another conversation is recorded at her family home in Bangkok, which also takes hotel guests. It wanders to chefs, the risk of one three-course meal too many, and what she has ordered to eat. For a first listen, the African currency conversation best shows the show's habit of reading one object as history, money and art all at once.