I've split them into three categories:
Salt: A World History by Mark Kurlansky. Guessed by Qatar.
Rats by Robert Sullivan. Guessed by Melchar.
3. It was at all times clear that, from the point of view of the idea it conveys to us, every motion must be considered only as a relative motion. Returning to the illustration we have frequently used of the embankment and the railway carriage, we can express the fact of the motion here taking place in the following two forms, both of which are equally justifiable: (a) The carriage is in motion relative to the embankment; (b) The embankment is in motion relative to the carriage.
Eats, Shoots & Leaves by Lynne Truss. Guessed by Alopex.
I'm Only Here for the Food by Alton Brown. Guessed by Witch of November.
6. A face peered in through broken glass. It bore an uncertain expression. "Is there a Mr. Stollitt or Mr. Pratchitt about?"
"I'm Stollitt," she said. "Sidney Stollitt." The face's accent was aristocratic. It was probably connected to a mark. "Why don't you come in?"
"Ah," said Timmaeus. "Thank you. Sidney's an unusual name for a girl, isn't it?" He turned the doorknob. It came off in his hand. He stared at it for a moment, then pushed on the door, which opened. He came into the office and set the knob on Sidney's desk.
"No," said Sidney, in complete defiance of the facts, "it's not."
7. "They didn't tell me this when they offered me the job!" Flere-Imsaho protested, slamming the empty body-shell shut again. "They say it's because the Empire isn't supposed to know how small us drones are! Why couldn't they just have got a big drone then? Why saddle me with this... this..."
"Fancy dress?" Gurgeh suggested.
"Fancy?" the library drone screamed. "Dowdy's what it is; rags! Worse than that, I'm supposed to make a 'humming' noise and produce lots of static electricity, just to convince these barbarian dingbats we can't build drones properly." The small machine's voice rose to a screech. "A 'humming' noise, I ask you!"
He heard his squadron leaders breathing heavily; he could also hear, from the observers behind him, a quiet curse. It was nice to know that one of the adults noticed that it wasn't a fair test.
Ender's Game by Orson Scott Card. Guessed by Brer.
"Thief!" the secretary shrieked, "Thief! Larcenist!"
"Don't, Sydelle," Angela said softly, her eyes set on the D she was embroidering.
"You wouldn't understand, Angela, you don't know what it's like to be..." Her voice broke. She paused then lashed out at her enemies, all of them. "Who cares a fig about Sydelle Pulaski? Nobody, that's who. I'm no fool, you know. I knew I couldn't trust any one of you. You can't read my shorthand because I wrote in Polish!"
The Westing Game by Ellen Raskin. Guessed by Foobart.
10. Conrad Conch was waddling toward him, gesturing with the pistol in his big pink right hand and shouting something unintelligible through his mouth hole.
Still holding his TEC-9, Tark walked over to Conrad Conch, who started shouting again through his mouth hole, obviously very pissed off. "MMMWMF!" he said.
"I got no idea what you're saying," said Tark. "Take off the damn head."
Conrad reached his big pink hands up and stuck them into the areas where his shoulders would be, if shells had shoulders. He gave an upward yank. There was the sound of Velcro fasteners letting go.
He had never had occasion to imagine an animal executing anything as erotic as a striptease. After all, beneath any clothing lay another layer of solid fur and not the bare flesh of a human. But eroticism has little to do with nudity, as he soon discovered. It was the movement, the supple twisting and turning that no human female could possibly match, that was stimulating.
Spellsinger by Alan Dean Foster. Guessed by Brer.
Mrs. Frisby and the Rats of NIMH by Robert C. O'Brien. Guessed by Brer.
The Wind in the Willows by Kenneth Grahame. Guessed by Altivo.
"Yes, that's what I've come for," replied the other. "You know me, don't you?"
"Yes, of course," he said, hoping he would be able to remember the name in a moment. Then he saw in the darkness of the burrow the stranger's ears were shining with a faint silver light. "Yes, my lord," he said. "Yes, I know you."
Watership Down by Richard Adams. Guessed by Brer.
Redwall by Brian Jacques. Guessed by Brer and Altivo.
Good luck and have fun! Comments are not screened so that people can see what's been guessed.