I may have stumbled on the solution.
Unsettled weather, incipient Frosh flu, malign astrological configurations- something at any rate saw me wide awake at 5 am after an unsettled night. Went downstairs, drank some warm milk, weighed myself as is my morning reflex (and discovered that those four pounds I'd shed two days ago are back) and picked a sure-fire put me to sleep book off the kitchen bookshelf: Motohashi Keiko's Daisan no Teikoku, the Third Reich, a series I thought I wanted to read but have found oddly difficult in practice. Of course I wasn't wearing my contacts: my lovely bifocal contacts that usually let me read without reading glasses if the light is strong enough etc etc, because I fully intended to go back to bed eventually. I had my glasses on- my lousy bifocal glasses that cost the earth and are useless for reading with unless I hold my head at an angle that induces an immediate crick in the neck. (My advice to you, young padawan, is to eschew bifocal glasses when you come of years: they are a snare and a delusion and a scam.) Presbyopia (the tendency to become long-sighted with age) has altered my short-sightedness to such an extent that I can now read without glasses at all, even though I tend to close one eye to do it.
But that's changed too, because there I was curled up on the sofa reading with both eyes and positively tearing through volume 2. And a good thing too, because fluff doesn't repay slow reading.
In sum, however- To read manga it helps to be able to see the text clearly. Note this for future reference.
I do wonder how long Daisan no Teikoku can keep up this trope of 'all the lovely boys who are after your heart are assassins who are after your life, and you know it and I know it' before it palls. I mean, it's palling as of vol 2 and there are eight more books to go. OTOH the sight of our underage super assassin with the ribbons binding his luxuriant bum-length locks still has its special and totally unlikely delights. But I still want her current series 黒孩子 to come out in tank.
And yes I did go back to bed and to sleep and dreamed about babies, I believe, because I always dream about babies. Got up at 10:30 and on a hunch weighed myself again. Four pounds lighter than at 5 am. You don't drop weight overnight, you drop it after 6 am.