In case you’re bored enough to actually start learning something at home (or are just an avid ebook collector) Springer Nature is providing a whole bunch of textbooks for completely free during this period. Get them before they change their minds! Link here.
As you may have noticed, however, it is a fairly large collection and you might have to spend quite a bit of time sifting through the collection to download the books you want. Worry not, however, now you won’t have to select and download individually with this Python code that downloads ALL the books and even categorizes for you. Just run the script in any IDE of your choice (I use the Spyder module within Anaconda for my Python needs).