It's not a book I would recommend but I would definitely recommend these which do not require membership costs, do not interfere with breastfeeding and the authors are not childless nannies (who most sleep experts seem to be, conveniently unattached hormonally!):

Science of Parenting by Margot Sunderland (covers sleep, tantrums - the whole lot great investment)
Sleeping Like a Baby by Pinky McKay
Helping Your Baby to Sleep by Anni Gethin