I had two dog-eared RAF Air Squadron logbooks (flimsy kiddy exercise books), my Fuerza Area Argentina PPL logbook, an NZ logbook and a Pooleys UK PPL logbook. Before I started my CPL training, I copied all the entries from all the logbooks into a Jeppesen FCL1.080 logbook. It only took a couple of afternoons and the result is a much more impressive logbook with all my experience under one cover.
When I go to interview I hand over the Jeppesen but keep my battered oldies in my bag just in case they are asked for.