>>24582306 (OP)because only books 'fit' in your tiny brain.
(You) have primitive understanding of the the paper and ink that make up a book. You might even have an idea about how to make one, how to work fibers the right way, where to find adhesive in a forest, or a blue or black pigment.
But (You) are unable to grasp how an ebook is made, let alone how it works. The simple working of a finger-tap eludes you. From the touchscreen raising the interrupt, the context switches, the cache lines getting replaced, the CPU executing the micro-ops, the flip flops holding on to the bits throughout the pipeline, bytes that make up the words getting loaded in the right places, the graphics pipeline setting display memory to output the next page. And the final interminable refresh of the e-ink display -- the one thing you might attempt to comprehend.
You soul only goes so deep and I pray that you one day understand this and that I may take in the working of the transistor and what lies beneath it.