void RemoveGlow(object oAlter)
{
effect eGlow = EffectVisualEffect(VFX_DUR_GLOW_RED);
RemoveEffect(oAlter, eGlow);
}

void main()
{
object oThief = GetLastClosedBy();
object oAlter = GetObjectByTag("DROWALTER");
object oBook = GetFirstItemInInventory(OBJECT_SELF);
object oO = GetObjectByTag("BOOK_O TAG",0);
object oP = GetObjectByTag("BOOK_P TAG",0);
object oE = GetObjectByTag("BOOK_E TAG",0);
object oN = GetObjectByTag("BOOK_N TAG",0);
location oLoc = GetLocation(GetWaypointByTag("WAYPOINT TAG"));

if ((oBook == oN) && (GetIsObjectValid(oBook)))
{
oBook = GetNextItemInInventory(OBJECT_SELF);
if ((oBook == oE) && (GetIsObjectValid(oBook)))
{
oBook = GetNextItemInInventory(OBJECT_SELF);
if ((oBook == oP) && (GetIsObjectValid(oBook)))
{
oBook = GetNextItemInInventory(OBJECT_SELF);
if ((oBook == oO) && (GetIsObjectValid(oBook)))
{
SetLocked(oAlter, FALSE);
RemoveGlow(oAlter);
}
}
}
}
}