Took me much longer than usual to grind through this book, a tale of the Second Doctor, Jamie and Zoe on a frontier planet where various factions are in conflict with each other, and really little of much interest happens. There is a brief framing narrative with Ace and the Seventh Doctor, who intervenes at a crucial point to help his former self. Prose style starts off rather badly but settles down to reasonable standards with occasional info-dumps. Not really recommended except for completists like me.