From the melakhah of writing to the Hebrew alphabet. Discussion about the letters themselves, and letter-play, apparently in the hands of the young students. "At-Bash" and other midrashim about the letters. And: Back to the halakhot about writing... All kinds of inks and other substances that are visible and lasting if you write with them. And where you write is pretty flexible too, wherein the two letters don't necessarily have to be next to each other, if they are legible and combine to make words. All that to make you chayav. Followed, of course, by all kinds of ways of being exempt from the korban (the substance if the writing, the location of where you write the two letters, etc.). Plus: what happens if you write over writing that is already there? And what happens if you write just one letter, not two, but with that one letter, you finish the book?