I have the Thinking Woman's Guide and just haven't gotten around to reading it, yet. I keep hearing such great things about it, though.
I, too, am in love with any book by Ina May Gaskin. Her childbirth book really changed the way I'm thinking about so many things. I feel so much more relaxed and comfortable with the decisions we're making and I feel like I'm making them much more informed about how I feel deep inside about so many things. I can't wait to get through a few more of my books and pick up her Spiritual Midwifery book. I have her breastfeeding book as well, but am going to wait until the 3rd trimester to start on that one.
Other than Ina May's book, one of my favorites so far has been the Everything Vegan Pregnancy Book. I honestly think that every pregnant woman could benefit from the nutritional information in the first part of the book. The author, an RD, goes into so many nutrients that your body needs extra of while pregnant and details what it does for the baby and in your body, why you need it and what foods you can use to get it naturally. There are even some great suggestions on how to "sneak" a little bit of this or that into your food. I don't think you need to be vegan or even vegetarian to find this book useful. I found it really insightful, easy to read and so helpful in making good choices with my food (even though I do eat pretty healthy anyway).
A book recommended to me by my naturopath that I also quite like is called The Natural Pregnancy Book: Herbs, Nutrition and other Holistic Choices. I love that it's written by an herbalist (and I think she's also a midwife, maybe?). There is a great section in there on safe herbs and such for when you have different ailments. It's a little crunchy in places, but I find it a great reference.
