Figure out how many days you have left in your growing season.
Count backwards from your usual first hard freeze date (for example, mine is usually October 15th in SW Wisconsin Zone 4/5) and you can grow anything that fits that time frame between today and that freeze date. Of course you can extend that time frame a bit by using row covers, a cold frame or even covering items with plastic over night to keep the cold air off.
As of today, I’ve got about 60 days left to grow things outside, but I am putting some tomato seedlings in the greenhouse and will dig up and pot some pepper plants, just to see if I can keep them producing under cover. (Unheated.)
For Fall crops I’ll plant Garlic (waiting for it to arrive!) lettuces, spinach, beets, radishes, green onions and maybe carrots - I never have good luck with carrots, but I keep trying!
Books I’d recommend:
‘Four Season Harvest’ by Elliot Coleman (I’ve met him - he’s DREAMY, LOL!) (He gardens in Maine)
‘The Year-Round Vegetable Gardener’ - Niki Jabbour (She gardens in Canada)
‘Building and Using Cold Frames’ (Pamphlet) - Garden Way Publishing
I’m zone 8/9 sw GA and nw FL...