Question: The characteristics for each character in the pilot were based on what book?
About the article "Gossip Girl", section "Development".

Candidate passages:
The "Gossip Girl" book series was originally supposed to be adapted into a film starring Lindsay Lohan with head "Gilmore Girls" creator Amy Sherman-Palladino.
When the film project did not get off the ground, Stephanie Savage and Josh Schwartz took over the project to create a television series.
As of October 2006, Schwartz was working on the pilot.
He said: "I was very skeptical.
I don't want to do "The O.C.
NYC".
But I thought the books were smart.
The characters are worldly in a way that Orange County kids aren't."
The characteristics for each character in the pilot were based on the first "Gossip Girl" book.
In January 2007, the show was given the green light by The CW.
Hamill voiced the character of Todd Wainio in "World War Z", a critically acclaimed audiobook based on Max Brooks' novel of the same name.
He also provided the entire cast of voices for a 1983 audiobook version of "Pinocchio" (with unique characteristics for each).
Hamill also reads life into the characters of the popular juvenile fiction book series, "The Spiderwick Chronicles Volumes I-III", by Holly Black and Tony DiTerlizzi. 
There are eight characters to choose from in the game and each of them fight inside their own unique mechs called "Walkers".
Unlike most fighting games at the time, each character also has a 'fighting rate' score which increases or decreases depending on how well they fight.
Pilot:  Pilot:  Pilot:  Pilot:  Pilot:  Pilot:  Pilot:  Pilot:  Celberus Pilot: Z'Hell The final boss and only unplayable character in "Schmeiser Robo".  
Sabrina the Teenage Witch is a 1996 American television film adaptation based on a character from Archie Comics.
It served as a pilot for the "Sabrina, the Teenage Witch" television series, and premiered on Showtime on April 7, 1996.
The only two actors who appeared in both the pilot, and eventual television series, were Melissa Joan Hart and Michelle Beaudoin, though Hart's character had a different surname, and Beaudoin's character had a name change in the series. 
"Champions", first published in 1981, was the first role-playing game in which character generation was based on a point-buy system instead of random dice rolls.
A player decides what kind of character to play, and designs the character using a set number of "character points", often abbreviated as "CP."
The limited number of character points generally defines how powerful the character will be.
Points can be used in many ways: to increase personal characteristics, such as strength or intelligence; to buy special skills, such as martial arts or computer programming; or to build superpowers, such as supersonic flight or telepathy.
This point system was praised by reviewers for the balance it gave character generation over random dice rolls.
Players are required not only to design a hero's powers, but also the hero's skills, disadvantages, and other traits.
Thus, "Champions" characters are built with friends, enemies, and weaknesses, along with powers and abilities with varying scales of character point value for each.
This design approach intends to make all the facets of "Champions" characters balanced in relation to each other regardless of the specific abilities and character features.
Characters are rewarded with more character points after each adventure, which are then used to buy more abilities, or eliminate disadvantages.