sixthlight

The later Hambly vampires books do some emotional threesome stuff with Ysidro that's interesting if you're into pining but it also kinda doesn't go anywhere due to important character reasons and then the series ends. They're all fairly enjoyable (although it's been a while since I read some of them and can't remember if the one in China is racially dodgy for example) and like you said, good for if you need something solid but not taxing.