Brothers in Arms (Vorkosigan Saga, #5)
by Lois McMaster Bujold
Reread for the nth time. The plot is a glorious tangled mess and it all comes together beautifully. If you are into mistaken identity and comedies of errors, this is gold. Also a good precursor to Memory because we start to see how Miles' conflicting identities are affecting him.
The cover is absurd and kitschy, as are most of the covers for this series, and now I'm thinking about how I would design it.