I’ve haven’t read this personally, and series-continuations, or in this case, series-interpolations, can be tricky things. But Karla’s Choice, which is set in John le Carré’s Circus universe, and time-wise, in between The Spy Who Came in from the Cold and Tinker Tailor Soldier Spy, gets pretty good reviews, so I thought I’d post it. It’s on sale right now for $1.99 in the US, as part of today’s Kindle Daily Deal, and price-matched at Kobo US. Oh yeah, and it’s by Nick Harkaway.
