Headbands being cursed: not really a thing. Of course, any magic item can be made to look like a different magic item, so you could make a headband that was a disguised Necklace of Strangulation or something, but there's no references in any of these books to subtle curses where the headbands alter your cognition slightly but undetectably, and it's not in anyone's threat model in fiction or nonfiction.

Mindreading magic: Detect Thoughts, second circle. A Will save protects against it. There are magic items of it; they're not even that expensive, though they also wouldn't read anyone powerful who was trying not to be read. 

Mindcontrolling magic: oh boy is there a horrifying variety. There's Suggestion, and Triggered Suggestion which you don't remember until you hit the cue for it, and Demand which is Sending with a concealed Suggestion, and Lesser Geas for binding someone to obey your orders for days at a time, and Geas which works on more powerful people, and Dominate Person which lets you puppet someone else at unlimited range as long as you're on the same plane as they are, and see through their eyes, and spells that cause permanent disorientation and the inability to reliably act on your intentions, and Euphoric Tranquility which does what it sounds like, and Overwhelming Presence which makes everyone who enters your presence prostrate themselves on the floor convinced they're in the presence of a god.

Baleful Polymorph renders you permanently a mindless animal.

There's memory modification.

There's a reference to a ninth circle spell that turns you into a book of all of the thoughts you've ever had, and lets people read and edit them, though it's in a work of fiction and it's not clear if the spell is a real thing or not. 

The best protection against mind control, outside an artifact helmet like the Crown of Infernal Majesty, is the spell Mind Blank, which is eighth circle and self-only so good luck if you're not an eighth circle caster and don't have one to make you scrolls. Protection from Evil helps against mind control from Evil creatures and casters. Enchantment Foil helps in general, as does Spell Immunity. A lot of adventurers at least in these works of historical fiction seem to deliberately pass through an antimagic area routinely just so they can notice if any spells fucking with them are active, though that won't detect past memory modification and requires there being one around. (Some wizarding academies have them for research reasons, and there's apparently several hundred square miles of wasteland where magic doesn't work as a consequence of an ancient war.)

Headbands being cursed: not really a thing. Of course, any magic item can be made to look like a different magic item, so you could make a headband that was a disguised Necklace of Strangulation or something, but there's no references in any of these books to subtle curses where the headbands alter your cognition slightly but undetectably, and it's not in anyone's threat model in fiction or nonfiction.

Mindreading magic: Detect Thoughts, second circle. A Will save protects against it. There are magic items of it; they're not even that expensive, though they also wouldn't read anyone powerful who was trying not to be read. 

Mindcontrolling magic: oh boy is there a horrifying variety. There's Suggestion, and Triggered Suggestion which you don't remember until you hit the cue for it, and Demand which is Sending with a concealed Suggestion, and Lesser Geas for binding someone to obey your orders for days at a time, and Geas which works on more powerful people, and Dominate Person which lets you puppet someone else at unlimited range as long as you're on the same plane as they are, and see through their eyes, and spells that cause permanent disorientation and the inability to reliably act on your intentions, and Euphoric Tranquility which does what it sounds like, and Overwhelming Presence which makes everyone who enters your presence prostrate themselves on the floor convinced they're in the presence of a god.

Baleful Polymorph renders you permanently a mindless animal.

There's memory modification.

There's a reference to a ninth circle spell that turns you into a book of all of the thoughts you've ever had, and lets people read and edit them, though it's in a work of fiction and it's not clear if the spell is a real thing or not. 

The best protection against mind control, outside an artifact helmet like the Crown of Infernal Majesty, is the spell Mind Blank, which is eighth circle and self-only so good luck if you're not an eighth circle caster and don't have one to make you scrolls. Protection from Evil helps against mind control from Evil creatures and casters. Enchantment Foil helps in general, as does Spell Immunity. Nondetection, which also comes in an amulet, is useful against divinations unless the person casting them is very powerful.

A lot of adventurers at least in these works of historical fiction seem to deliberately pass through an antimagic area routinely just so they can notice if any spells fucking with them are active, though that won't detect past memory modification and requires there being one around. (Some wizarding academies have them for research reasons, and there's apparently several hundred square miles of wasteland where magic doesn't work as a consequence of an ancient war.)

Headbands being cursed: not really a thing. Of course, any magic item can be made to look like a different magic item, so you could make a headband that was a disguised Necklace of Strangulation or something, but there's no references in any of these books to subtle curses where the headbands alter your cognition slightly but undetectably, and it's not in anyone's threat model in fiction or nonfiction.

Mindreading magic: Detect Thoughts, second circle. A Will save protects against it. There are magic items of it; they're not even that expensive, though they also wouldn't read anyone powerful who was trying not to be read. 

Mindcontrolling magic: oh boy is there a horrifying variety. There's Suggestion, and Triggered Suggestion which you don't remember until you hit the cue for it, and Demand which is Sending with a concealed Suggestion, and Lesser Geas for binding someone to obey your orders for days at a time, and Geas which works on more powerful people, and Dominate Person which lets you puppet someone else at unlimited range as long as you're on the same plane as they are, and see through their eyes, and spells that cause permanent disorientation and the inability to reliably act on your intentions, and Euphoric Tranquility which does what it sounds like, and Overwhelming Presence which makes everyone who enters your presence prostrate themselves on the floor convinced they're in the presence of a god.

Baleful Polymorph renders you permanently a mindless animal.

There's memory modification.

There's a reference to a ninth circle spell that turns you into a book of all of the thoughts you've ever had, and lets people read and edit them, though it's in a work of fiction and it's not clear if the spell is a real thing or not. 

The best protection against mind control, outside an artifact helmet like the Crown of Infernal Majesty, is the spell Mind Blank, which is eighth circle so good luck if you're not an eighth circle caster and don't have one to make you scrolls or cast it for you. Protection from Evil helps against mind control from Evil creatures and casters. Enchantment Foil helps in general, as does Spell Immunity. Nondetection, which also comes in an amulet, is useful against divinations unless the person casting them is very powerful.

A lot of adventurers at least in these works of historical fiction seem to deliberately pass through an antimagic area routinely just so they can notice if any spells fucking with them are active, though that won't detect past memory modification and requires there being one around. (Some wizarding academies have them for research reasons, and there's apparently several hundred square miles of wasteland where magic doesn't work as a consequence of an ancient war.)