"Raising Twins". I have read several and liked it the best. Written by a pediatrican and mother of twins (and another sibling) who did both BF and FF. I really appreciated her balanced perspective and it is well written, well organized.
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I did read Juggling Twins. I picked up some things from it. There are none I was wild about but I did like Mothering Multiples (more about pregnancy and BFing but some about general twin-baby-care). What benefited me most though was following EASY from Baby Whisperer, trying to get them on the same schedule, the Happiest Baby on the Block DVD, Healthy Sleep Habits Happy Child ... and this board. The Twinstuff forums were really helpful too; their forums are broken down by pregnancy, age groups, etc.
I really liked "Ready or not, here they come" by Elizabeth Lyons. It was very practical information like how to get the car seats on and the stroller into the store, little things I didn't realize I'd need to think through.
Re: Good books about juggling twins?