I think DF needs 3 new professions.
Writer
The Writer profession is used to, obviously, write. Turning on the profession turns off all others [Writers do not work!]. A writer will need an office, some paper [Made at a carpenters workshop, 5000 sheets from a log i figure, maybe less.], and a pen [traded for, or made from wood, bone, or metal at a craftdwarfs shop.]. The writer can have a submenu [or just switch between them] to activate his style. He can do poetry, which would make shorter books or collections of poem books; History, where he simply writes down the history of the area; Short stories, where he can either invent situations, or take existing battles/situations and expand/change them. Books will grant dwarves a happy thought or a bad thought [Urist was deeply involved in a good book lately. <or> Urist was upset/disappointed by a book lately.]. Books can be sold to merchants, or stored in bookshelves [which have the room option of library].
Bookbinders can be wrapped into Writer, or craftsdwarf, but they actually bind the book in leather, and add things based on story quality [gems, bones, metal].
Cartographer
Once the arc is made that allows interaction with the outside world, the cartographer can be used. He is a dwarf that takes some paper, hide, a pen, and instruments [I figured he can use craftsdwarf instruments, but I know those are like drums. I figure they can also be sextants and compasses]. He goes out into the surrounding lands and maps them out, and when he makes enough maps he can make an atlas from them, and store them in bookselves. Atlases would be good for armys [not sure how they will work, but this would make navigation easier?], Embark screens [like a regional prospector?], and adventure mode [Points of interest, ect.?]
Those are my ideas. You can also add in your own ideas if you wish.