I'm about halfway through John Ringo and Julie Cochrane's 'Cally's War', which is a spin-off from Ringo's main 'Legacy of the Aldenata / Posleen war' series.
'Cally's War' deals with the counterespionage adventures and midlife crisis of the titular Cally, daughter of the main series' "Iron Mike" O'Neill. The book was rather poorly received by Ringo fans, and many blamed Cochrane for a move away from the heavy-duty military SF of the original series towards a more conventional thriller format.
The erotica content is up, and in that respect I'm inclined to think that here Ringo was beginning to indulge himself, although he hadn't quite gotten into his full swing (for that, check out his recent work, especially the 'Kildar' novels).
I actually like 'Cally's War' more than I thought I would. Can't spot any continuity errors, and it feels like Ringo did more of the writing on this one than when he partnered up with Tom Kratman for 'Watch on the Rhein'. Particularly fascinating are the almost travelogue-style interludes where we follow Cally as she hitches rides through postwar USA, travelling in convoy to avoid feral Posleen and discovering the surviving citizenry living a lifestyle of polar opposites- awesome galtech technology in some places, almost depression-era poverty in others.