Context: after eating a death cap (Amanita phalloides), you'd notice a few of the symptoms at first, but these usually resolve after a day or two. After this, you'll enter a latent phase where you feel fine, but your liver and kidneys slowly start to fail. By the time you notice, it's usually already too late.
I wouldn't trust books when it comes to hunting mushrooms, slop or not.
Don't go hunting mushrooms unless your family's taken you hunting mushrooms since you were a kid (and even then only in regions you're familiar with, and even then don't pick any mushroom you're not 110% certain of, and if you're not an idiot), or accompanied by someone with that experience verifying every single mushroom you find before picking it up, and telling you why and how it'd've killed you or why it wouldn't've tasted good.
Nothing wrong with picking a mushroom to ID at home or at an ID clinic run by your local mycology club. You should individually inspect each specimen as you're cleaning them anyway so you can throw out any which might be going bad, chock full of bugs, or misidentified.
When in doubt, throw it out.
Good advice, but respectfully there are some trustworthy books. So long as the reader actually follows all of the verification steps in those books.
And definitely not those fly-by-night, probably AI-generated 'slop' books online!.
My wife & I only moved out to the west coast in our 40s, and in the decade since, we (slowly! carefully!) learned how to recognize the safe species. Just don't take any stupid risks -- be absolutely sure of an ID before eating. Show what you've collected first, if it's a new one, to someone local who knows and learn from their experience.
One good book is All That The Rain Promises ...
The cover of that book is something else hahaha