Here are some of the books that are most popular this book fair season, according to Isabel Berg of Bookfairsbybookends.com:

Picture Books (K-3):
"Just Kidding," by Trudy Ludwig , illus. by Adam Gustavson (Tricycle Press), $15.95
"From Dawn till Dusk," by Natalie Kinsey-Warnock , illus. by Mary Azarian (Houghton Mifflin), $6.95

Early Readers (K-3):
"Henry and Mudge and the Great Grandpas," by Cynthia Rylant, illus. by Sucie Stevenson ( Simon & Schuster), $3.99
"'Earth Smart," by Leslie Garrett (DK Publishing), $3.99
"Dogs," by Emma Helbrough , illus. by Patrizia Donaera & Uwe Mayer (Usborne- EDC), $4.99

Beginning Chapter Books (grades 2-4)
"Magic Tree House #36 Blizzard of the Blue Moon," by Mary Pope Osborne , illus. by Sal Murdocca , (Random House) $11.95
"Nancy Drew and the Clue Crew, #1 Sleepover Sleuths, " by Carolyn Keene, illus by Macky Pamintuan, Simon & Schuster, $3.99

Grades 3 to 5:
"Fairest," by Gail Carson Levine (HarperCollins), $16.99
"Room 1," by Andrew Clements (Simon & Schuster), $15.95
"Clarice Bean Spells Trouble," by Lauren Child (Candlewick Press), $5.99
"Ice Drift," by Theodore Taylor (Harcourt), $5.95

Series (grades 4-5):
"Artemis Fowl, The Lost Colony" by Eoin Colfer (Miramax Books - Hachette), $16.95
Ranger's Apprentice, The Ruins of Gorlan," by John Flanagan (Penguin), $6.99
"Beacon Street Girls, Charlotte in Paris" by Annie Bryant (B*Tween Productions), $7.99

Nonfiction titles for all ages:
"Mathematickles," by Betsy Franco, illus by Steven Salerno, (Simon & Schuster), $6.99
"Grandmothers' Stories: Wise Women Tales from Many Cultures" retold by Burleigh Muten, illus. by Sian Bailey, CD read by Olympia Dukakis (Barefoot Books), $16.99
"The American Story, 100 True Tales from American History," by Jennifer Armstrong, illus. by Roger Roth (Random House), $34.95
"Soccer, the Ultimate Guide to the Beautiful Game," by Clive Gifford ( Kingfisher), $8.95
"DK Guide: Weather," by Michael Allaby (DK Publishing), $7.99 (ages 9-12).