Definitely agree with 'Daring to be different' by Sarah Johnson.
Also, 'Good children' by Lynette Burrows.
Two good motivational books for mothers (which do not give parenting advice specifically'):
'Your vocation of love' by Agnes M. Penny (she has also written a great one for expectant monthers, 'Your labour of love' which might be good for you now!) These books are not widely available but I got mine here: www.cenacle.co.uk/products.asp?recnumber=2783
My absolute favourite: 'A mother's rule of life' by Holly Pierlot. The website www.mothersruleoflife.com/ will give you an idea of what this is about.