The Tome of Knowledge Sharing is a book added by Thaumic Tinkerer. When crafted, the first player to right-click on the Tome will save all their research in it. Any other player who then right-clicks the Tome will be given all the research stored inside.
If one day you happen to want to share your knowledge with the rest of the world, this is the item for you.
By simply right clicking on this tome and handing it to someone else, they'll get all the research you've discovered so far.
(Note: Case there being no recipe on the right of this, the recipe is disabled and the item is creative only)