Hi kitty a good book to read is "Why Love Matters" by Sue Gerhardt - it's not a particularly easy read, but readable in chunks - I dipped in and out of it. It's really important though about attachment issues because she cites evidence that proves that the pathways of the brain are altered irrevocably during early days, weeks and months, dependent upon the attachment pattern between baby and mother/father/carer. She also talks of how the foetus in utero can be adversely affected by extreme tension in the mother and by issues like domestic violence.
It will be on Amazon and is a paperback so not very expensive.
The issue of drink and drug abuse when pregnant are things that are not uncommon in terms of the safeguarding of children. Babies can be born with drug "addiction" but it is possible for them to be safely withdrawn from the damage that was done to them in utero, although it means a longer stay in hospital and stress to the baby.
Babies born to mothers who seriously abuse alcohol whilst pregnant is much worse because they can be born with Foetal Alcohol Syndrome and there is no medical intervention that can reverse or remedy this. The reason is because alcohol can actually enter the placenta and damage the cells of the foetus in utero and adversely affect the foetus at each stage of development.
The other thing about FAS is that some 80% of cases in the UK are undiagnosed through lack of knowledge about this problem, even amongst medics. As it is a syndrome the affected baby can grow to be anywhere between completely normal at one end of the continuum to seriously affected throughout the lifespan at the other end. These children very often show very disturbed and disturbing behaviour and as they are largely undiagnosed their behaviour is often seen at home and in school as something that needs to be corrected, and whatever measures are taken in this respect, merely compound the problem.
Needless to say the USA are streets ahead of us in understanding FAS. If you google there is a plethora of information. The book I would recommend is "Foetal Alcohol Syndrome - the Hangover Without a Cure" - can't remember the author, and I loaned it to someone and never got It back. Again not an easy read but I found it helpful as I was dealing with such a case.
I think I suggested going on BAAF website as they have good publications you could read as I imagine Fostering Network do too.
Another good book (but expensive I think and somewhat outdated) is a "Child's Journey Through Placement" by Vera Falbherg (an American woman who is a colossus as far as fostering and adoption is concerned.
I'm not sure what books you are reading about people who were abused and neglected as children, if they are the "misery memoirs" which have flooded onto the market, I would give them a miss. Many of them have been found to be untrue or hugely exaggerated. Similarly I would avoid those paperbacks by Cathy Glass who claims to be a foster carer but I honestly don't believe that she is, although her books state they are non-fiction, and MN recommends them.