That first aid usmle book one can buy old Ed too or is it ki new Ed is must

That first aid usmle book - one can buy old Ed too or is it ki new Ed is must.

There will be new points added in every FA edition based on what new has been asked in that year.

FA has to be annotated from uworld.

You can get the previous edition as well. Unless you add more points to FA, it is useless

Use a pdf
It’s available very easily