I read Calamity first how badly have I ruined books 1 & 2

[Eccentric Hero he/him]

I find that storing it in a coppermind helps.

[Fallen Rope he/him]

That is the best use of Feruchemy, you would never have to deal with waiting for the next book in the series.

[Straw he/him]

This. Is. Very. Bad.