Although "Icewind Dale" comes complete with a 100+ page spiral bound book that explains everything from character stats to combat to spells, there are enough little side quests in the game that most players will need to turn somewhere for hints or help at some point.
Strategy guides such as this one fill that role by providing detailed tables on, for example, magic items that you might encounter in the game, monster stats, and "walkthroughs" that tell you how to complete a level.
Before you decide to buy this book, however, check out the free offerings on the Net. www.bgdungeon.com has an "Icewind Dale" section that provides you with lots of goodies, ranging from lists of magic items to walkthroughs to detailed maps of the levels. There are message boards where you can find solutions to particular problems, or get advice on dealing with monsters, or -- as will become necessary due to the numerous bugs in the game -- technical support.