You searched for books with "O" in the title. Here’s what I dug up.

Title Subtitle Call number Author Illustrator Series Book type Subjects
Othello, the Moor of Venice 822.33 Mac Macaw Books Nonfiction Love; Jealousy; Plots; Betrayal; Ambition View
On the Banks of Plum Creek Wil Wilder, Laura Ingalls Williams, Garth Fiction Families; Manners; Frontier and pioneer life; Minnesota; Customs View
On Beyond a Million An Amazing Math Journey 513.55 Sch Schwartz, David M. Meisel, Paul Nonfiction Numbers; Counting; Mathematics; Googol; Infinity View
On Board the Titanic What It Was Like When the Great Liner Sank 910.9163 Tan Tanaka, Shelley Marschall, Ken Nonfiction Shipwrecks; Titanic, the; Ships, cruise View
Once A Mouse. . . A Fable Cut In Wood 398.2452 Bro Brown, Marcia Brown, Marcia Fiction Jungles; Hermits; Thankfulness; Folktales; Mice; India; Pride View
Once Upon a Company . . . E Hal Halperin, Wendy Anderson. Halperin, Wendy Anderson, illus E Business; College; Money; Buying and selling View
Once Upon a Golden Apple E Lit Little, Jean, and Maggie de Vries. Gilman, Phoebe, illus E Fairy tales; Storytelling-e View
Once Upon a Starry Night A Book of Constellations 523.8 Mit Mitton, Jacqueline Balit, Christina Nonfiction Stars; Constellations; Astronomy View
Once Upon a Time Saints 270.0920 Poc Pochocki, Ethel Matt, Tom Nonfiction Saints; Catholicism; Saints, lives of View
Once Upon a Tomb Gravely Humorous Verses 811.54 Lew Lewis, J. Patrick Bartram, Simon Nonfiction Poems; Tales, scary; View
On the Court with . . . Michael Jordan 92 Jor Christopher, Matt Nonfiction Basketballl; Professional sports; Sports heroes; Jordan, michael View
On the Day You Were Born E Fra Frasier, Debra. Frasier, Debra, illus E Birth View
One E Rad Radunsky, Vladimir. Radunsky, Vladimir, illus E Bragging; Families; Armadillos View
One and only Zoe Lama Coh Cohen, Tish Zoe Lama Fiction Fathers; School View
One Beetle Too Many The Extraordinary Adventures of Charles Darwin 92 Dar Lasky, Kathryn Trueman, Matthew Nonfiction Evolution; Darwin, charles; Biologists, animal; Natural selection; Naturalists View
One Candle E Bun Bunting, Eve. Popp, K. Wendy, illus E Hanukkah; Holocaust View
One City, Two Brothers A Story from Jerusalem 398.2089 92 Smi Smith, Chris Fronty, Aurelia Fiction Brothers; Jerusalem; Solomon, king of israel; Folk tales, jewish View
One Cool Friend E Buz Buzzeo, Toni. Small, David, illus Fiction Penguins; Pets View
One Day in the Woods EC Geo George, Jean Craighead. Allen, Gary, illus Fiction Forests; Birds View
One Evil Summer Sti R. L. Stine Fear Street Fiction Mysteries; Siblings; Girls; Babysitters; Crime View
One-Eyed Cat Fox Fox, Paula Fiction Accidents; Secrets; Guilt; Guns View
One False Note (The 39 Clues, Book 2) One False Note Kor Korman, Gordon The 39 Clues Fiction Spies; Family; Race View
One Fat Summer Lip Lipsyte, Robert Fiction Boys; Dieting; Teenagers; Obesity; Self-acceptance; Overweight; View
One Fine Trade 398.209 76 Mil Miller, Bobbi Hillenbrand, Will Nonfiction Weddings; Folktales, american; Daughters; Trading View
One Fish Two Fish Red Fish Blue Fish E Seu Dr. Seuss. Dr. Seuss, illus Easy Animals View
One Grain of Rice A Mathematical Folktale 398.209 5402 Dem Demi Demi Nonfiction Counting; Folktales; Mathematics; Folktales, indian subcontinent; Mathematical principles View
One Halloween Night E Tea Teague, Mark. Teague, Mark, illus E Halloween; Teasing; Magic View
One Hundred and One Dalmatians Dis Disney, Walt. Smith, Dodie Fic Dogs; Thieves View
One Hundred and One Dalmatians E Dis Disney, Walt. Smith, Dodie E Dogs; Thieves View
One Hundred Hungry Ants Pin Pinczes, Elinor J. MacKain, Bonnie Easy Counting; Food; Ants; Picnics View
One Hundred Shoes ER Ghi Ghigna, Charles. Staake, Bob, illus Fiction Centipedes; Shoes; Arithmetic View
One Lonely Seahorse E Fre Freymann, Saxton. Freymann, Saxton, illus E Sea horses; Loneliness; Friendship View
One Million Things A Visual Encyclopedia 030 Fer Ferris, Julie, et al., eds. Nonfiction Earth; Astronomy; Nature; Human body; History; Technology; Space; Culture; Geography View
One-Minute Favorite Fairy Tales 398.2 Lew Lewis, Shari Mahan, Benton Reference Folktales; Fairy tales; Folktales, multi-cultural View
One Morning in Maine E McC McCloskey, Robert. McCloskey, Robert, illus E Maine; Teeth View
One Nation America Remembers September 11, 2001 973.931 Sul Sullivan, Robert, ed. Nonfiction United states; New york city; United states--history--miscellanea; 9/11; September 11, 2001; Al queda; Osama bin laden; View
One of Those Days E Ros Amy Krouse Rosenthal Rebecca Doughty Easy Children; Optimism; Bad moods; Misadventures View
One Potato, Two Potato, Three Potato, Four 165 Chants for Children 398.8 Col Colgin, Mary Lou Moceyunas, Sheila Nonfiction Children; Nursery rhymes; Chants View
One Riddle, One Answer E Tho Thompson, Lauren. Wingerter, Linda S., illus E Riddles; Mathematics; Princes and princesses View
One Tiny Turtle 597.92 Dav Davies, Nicola Chapman, Jane Nonfiction Ocean; Turtles; Cycle of life; Wildlife, oceans; Sea turtles; Eggs, turtle View
One Well The Story of Water on Earth 553.7 Str Strauss, Rochelle Woods, Rosemary Nonfiction Water; Earth; Oceans; Wells; Freshwater; Salt water; View
One Zillion Valentines E Mod Modell, Frank. Modell, Frank, illus E Valentine's day; Valentines View
On the Farm E Ell Elliott, David. Meade, Holly, ilus E Farms; Animals View
On the Far Side of the Mountain Geo George, Jean Craighead George, Jean Craighead Fiction Running away; Falcons; Mountain life View
On the Go 380 Mor Morris, Ann Nonfiction Travel; Airplanes; Trains; Boats; Cultures, world View
Onion John Kru Krumgold Shimin, Symeon Fiction Friendship; Fathers; Sons View
Only One Year Che Cheng, Andrea Wong, Nicole Fiction Siblings; Chinese americans; Separation (families) View
Only a Star E Fac Facklam, Margery. Carpenter, Nancy, illus E Christmas; Nativity View
On the Mall in Washington, D. C. A Visit to America's Front Yard 975.3 Ash Ashabranner, Brent Nonfiction Washington, d.c.; Smithsonian institution; Lincoln memorial;; National mall, the; Washington memorial; Capitol building, united states; View
On the Mayflower Voyage of the Ship's Apprentice & a Passenger Girl 973.2 Wat Waters, Kate Nonfiction Pilgrims; Sailing ships; Mayflower, the; United states history, colonial View