I’m absolutely with you on the typing, the problem is (as far as I’m concerned) that learning typing takes a ton of time that I don’t want to spend just on that, so I’ll instead provide them with resources on how to improve typing skills if they want to.
Text of an average book is 100,000 letters; with a very smart and optimized compression/prediction algorithm (which hopefully is far smaller than 1GB), it is reasonable to expect a single char to be less than half a byte in size, so 50kB per book (saving without covers of course), this would mean around 20,000 books in a GB (not really, the compression algorithm probably also takes quite some MBs)— which should be enough for quite some time.