Normally, I suffer from S.A.D. But this year I've been taking vit d, on prescription, because I have bone probs caused by vit d deficiency. It's had a knock-on effect: I haven't yet had S.A.D.
Normally at this time of year you will mostly find me sleeping, waking only to feed the cats and me. If I read in the throes of S.A.D. it would be light humour, or books aimed at children, such as Blyton's Famous Five. Something light, cheerful and very easy to read, demanding little brain-power.
I'm having a blood test tomorrow to check my vit d levels and to get a prescription. Fingers crossed, I won't have gloomy winters again, so can read classics, thrillers, horrors etc