Comprehension

Comprehension is a Fallout 2, Fallout Tactics, J.E. Sawyer's Fallout Role-Playing Game, Fallout 3, and Fallout: New Vegas perk.

Fallout 2 and Fallout Tactics
Yes, reading can be fun. You receive twice as many skill points when reading books.

Since you can only get 92% in a skill from books in Fallout 2, this is rather worthless. However, in Fallout Tactics, the number of points you can get caps out at around 135%.

Fallout 3
You gain one additional skill point whenever a skill book is read. However, points gained from books before selecting this perk are not doubled. Remember to save up Your Skill Books before you get this Perk as it will definitely be worth the wait.

J.E. Sawyer's Fallout Role-Playing Game
You pay much closer attention to details when you are reading. You gain 50% more skill points when reading skill-increasing books.

Works well if one of your friends has Esteemed Academic, so they can write books for you.

Fallout: New Vegas
You gain an additional skill point for reading a book (For a total of 4 instead of 3), and double the temporary skill points from magazines (For a total of twenty). As in all other instances of the Comprehension perk, it will not affect books and magazines read prior to selecting this perk.