Authors are still posting extracts from their work online - David Walliams is reading a chapter a day from one of his books - you can catch up for up to a week!
I also thought you might enjoy this from David Walliams - it's a selection of extracts of his best villains! Which do you think is the scariest?
Books trust also have a lovely website where they post different links every day on their 'hometime' section:
There are extracts from stories to listen to, but also tips on writing from top authors and even some drawing guides from illustrators! Happy exploring!