Check any of the available walk throughs and they will be listed there.
Great spirits have always found violent opposition from mediocre minds. The latter cannot understand it when a person does not thoughtlessly submit to hereditary prejudices but honestly and courageously uses their intelligence.
Made a little shortcut for you here:[url="http://www.gamebanshee.com/baldursgate/equipment/tomes.php"]http://www.gamebanshee.com/baldursgate/equipment/tomes.php[/url]
If you don't like the idea of pickpocketing a good priest, you can get it by asking for it when in dire peril. You can then pickpocket the cure for the geas from the high priest of an evil god.