the My Father's Dragon trilogy, by Ruth Stiles Gannet
My Father's Dragon (again)
the Doctor Dolittle books, by Hugh Lofting
Where the Mountain Meets the Moon, by Grace Lin
Half Magic, by Edward Eager
How to Train Your Dragon, by Cressida Cowell
The Spiderwick Chronicles, by Tony DiTerlizzi and Holly Black
Thomas and the Dragon Queen, by Shutta Crum
The Marvelous Land of Oz, by L.Frank Baum
Ozma of Oz, by L.Frank Baum
Kenny and the Dragon, by Tony DiTerlizzi
The Reluctant Dragon, by Kenneth Grahame
Raising Dragons, by Jerdine Nolan
The Wind on the Moon, by Eric Linklater
The Princess and the Goblin, by George Macdonald
The Amazing World of Stuart, by Sara Pennypacker
Ricky Ricotta's Mighty Robot, by Dav Pilkey
Geronimo Stilton series
Flat Stanley series, by Jeff Brown
Beach adventures:
The Paradise Trap, by Catherine Jinks
The Worry Week, by Anne Lindbergh
Biography:
The Who Was/Who Is? series
Books about kids:
Anna Hibiscus, by Atinuke
(more on Anna Hibiscus at this link)
The Riverside Kids books (starting with Busybody Nora), by Johanna Hurwitz
The Jamie and Angus Stories, by Anne Fine
The Sophie books, by Dick King-Smith
Lulu and the Brontosaurus, by Judith Viorst
The Stories Julian Tells, by Ann Cameron
Clementine, by Sara Pennypacker
The Boxcar Children, by Gertrude Chandler Warner
Molly McIntire books, by Valerie Tripp (American Girl)
Addy Walker books, by Connie Porter (American Girl)
More on the American Girl series
The Stink series, by Megan McDonald (Annie's take on the first book)
Mrs. Piggle-Wiggle, by Betty MacDonald (Deborah's take) (Annie's take)
The Amazing World of Stuart, by Sara Pennypacker
The Pet Trouble series, by Tui Sutherland
The Cam Jansen series, by David Adler
Nancy Clancy, Super Sleuth series, by Jane O'Connor
Violet Mackerel, by Anna Branford
Books with racially and ethnically diverse characters:
Anna Hibiscus, by Atinuke
(more on Anna Hibiscus at this link)
The Pet Trouble series, by Tui Sutherland
The No. 1 Car Spotter series, by Atinuke
The Great Cake Mystery: Precious Ramotswe's Very First Case, by Alexander McCall Smith
Akimbo and the Lions/Akimbo and the Elephants, by Alexander McCall Smith
The Day of Ahmed's Secret, by Florence Parry Heide and Judith Heide Gilliland
On My Way to Buy Eggs, by Chih-Yuan Chen
Books about animals:
Martin's Mice, by Dick King-Smith
Three Terrible Trins, by Dick King-Smith
The Mouse and the Motorcycle, by Beverly Cleary
Mr. Popper's Penguins, by Richard and Florence Atwater
The Wind in the Willows, by Kenneth Grahame (abridged and illustrated by Inga Moore)
Charlotte's Web, by E.B. White (more on it here)
How to Scratch a Wombat, by Jackie French (nonfiction)
The Trumpet of the Swan, by E.B. White
The Cricket in Times Square, by George Selden
The Pet Trouble series, by Tui Sutherland
Ricky Ricotta's Mighty Robot, by Dav Pilkey
Geronimo Stilton series
Books about toys:
Toys Go Out, by Emily Jenkins
Winnie the Pooh, by A.A. Milne
Books that deal with death:
Charlotte's Web, by E.B. White
Stink: The Incredible Shrinking Kid (death of a newt)
Chapter books that look like picture books ("read-aloud" versions):
The Wizard of Oz, by L. Frank Baum, ill. Charles Santore
Snow White, by Charles Santore
Fantastic Mr. Fox, by Roald Dahl
Charlie and the Chocolate Factory, by Roald Dahl
James and the Giant Peach, by Roald Dahl
Peter Pan, by J.M. Barrie
The Classic Tales of Brer Rabbit, by Joel Chandler Harris
The Classic Treasury of Aesop's Fables, ill. Don Daily
Early chapter books for slightly older kids:
Ramona the Pest , by Beverly Cleary (and other Ramona books, of course)
Fairy Tales:
The Fairy's Return by Gail Carson Levine
Shakespeare's Storybook: Folk Tales that Inspired the Bard
Graphic novels:
Advice on reading graphic novels aloud
The Bone series, by Jeff Smith
Zita the Spacegirl, by Ben Hatke
Tales from Shakespeare, by Marcia Williams
Guinea Pig, Pet Shop Private Eye, by Colleen AF Venable and Stephanie Yue
Fairy Tale Comics: Classic Tales told by Extraordinary Cartoonists, ed. Chris Duffy
Rapunzel's Revenge, by Shannon and Dean Hale
Annie Sullivan and the Trials of Helen Keller, by Joseph Lambert
The Olympians series, by George O'Connor
Historical series:
Molly McIntire books, by Valerie Tripp (American Girl)
Addy Walker books, by Connie Porter (American Girl)
More on the American Girl series
What Was... series
"My Name is America" (fictional diaries of boys)
"I Survived" series, by Lauren Tarshis
"You Choose: An Interactive History Adventure" series
The Magic Treehouse series, by Mary Pope Osborne
Mystery:
Ottoline and the Yellow Cat, by Chris Riddell
Ottoline Goes to School, by Chris Riddell
the Nancy Drew series, by Carolyn Keene
the Encyclopedia Brown mysteries, by Donald J. Sobel
the Meg Mackintosh series, by Lucinda Landon
the "Get a Clue" series, by Julian Press
Nate the Great, by Marjorie Weinman Sharmat
the Jigsaw Jones series, by James Preller
Guinea Pig, Pet Shop Private Eye, by Colleen AF Venable and Stephanie Yue
The Cam Jansen series, by David Adler
Agatha, Girl of Mystery series, by Sir Steve Stevenson
Poetry:
When We Were Very Young, by A.A. Milne
Now We Are Six, by A.A. Milne
I Saw Esau: The Schoolchild's Pocket Book, ed. Iona and Peter Opie, ill. Maurice Sendak
The World is Round, by Gertrude Stein, ill. Clement Hurd
The World is Round, by Gertrude Stein, ill. Clement Hurd
Politics:
Bad Kitty Runs for President, by Nick Bruel
Really good abridged versions of books for older kids:
The Wizard of Oz, by L. Frank Baum (abridged, Santore illustrations)
Peter Pan, by J.M. Barrie (abridged, Classic Starts version)
The Wind in the Willows, by Kenneth Grahame (abridged and illustrated by Inga Moore)
Merlin and the Making of a King (by Margaret Hodges, illus. Trina Schart Hyman)
Tales from Shakespeare, by Tina Packer
The Winter's Tale, retold by Bruce Coville