Hun, your baby is a 'good' sleeper, she just prefers to do it in your arms. To me, that sounds like, secure, attached, contented baby and Mum whose responsive to her baby's needs. I can't see where there's a problem. The only problem seems to be that you've picked up a book that doesn't fit your situation and it's made you feel bad. How would you feel about what you're doing if you'd never read it?

My only suggestion is to perhaps try a sling or a carrier while she sleeps so you can get around if you want to. But if you don't want to then pffft to everyone/every book that's making you feel bad. You sound like an absolutely lovely Mum There is no 'should' in parenting and your baby will of her own accord learn to sleep alone when she's ready.