Here's a list of highly recommended books for preschool-aged children:

Classic & Beloved Picture Books:

• The Very Hungry Caterpillar by Eric Carle (Concepts: days of the week, counting, life cycle, food)

• Goodnight Moon by Margaret Wise Brown (Calming bedtime ritual, familiar objects)

• Brown Bear, Brown Bear, What Do You See? by Bill Martin Jr. & Eric Carle (Repetition, colors, animals)

• Chicka Chicka Boom Boom by Bill Martin Jr. & John Archambault (Alphabet, rhythm, rhyming)

• Where the Wild Things Are by Maurice Sendak (Imagination, managing big feelings)

• Corduroy by Don Freeman (Friendship, kindness, perseverance)

• If You Give a Mouse a Cookie by Laura Numeroff (Cause and effect, humor)

• Harold and the Purple Crayon by Crockett Johnson (Creativity, imagination)

• The Snowy Day by Ezra Jack Keats (Exploring nature, simple joys, Caldecott Medal Winner)

• Make Way for Ducklings by Robert McCloskey (Family, urban exploration, Caldecott Medal Winner)

• Go, Dog. Go! by P.D. Eastman (Colors, concepts like fast/slow, fun language)

• Are You My Mother? by P.D. Eastman (Searching, belonging)

• The Little Engine That Could by Watty Piper (Perseverance, positive thinking)

• Blueberries for Sal by Robert McCloskey (Nature, family bonding)

Books for Social-Emotional Development:

• The Feelings Book by Todd Parr (Identifying and understanding emotions)

• Don't Let the Pigeon Drive the Bus! by Mo Willems (Boundaries, humor, problem-solving)

• Grumpy Monkey by Suzanne Lang (Dealing with grumpy moods, friendship)

• Jabari Jumps by Gaia Cornwall (Overcoming fear, bravery)

• Chrysanthemum by Kevin Henkes (Self-esteem, acceptance)

• The Way I Feel by Janan Cain (Naming feelings)

• I Am Enough by Grace Byers (Self-love, confidence)

• The Rabbit Listened by Cori Doerrfeld (Empathy, being a good listener)

• When Sophie Gets Angry--Really, Really Angry... by Molly Bang (Managing anger, self-calming)

• Giraffes Can't Dance by Giles Andreae (Self-acceptance, individuality)

• The Bad Seed series (The Bad Seed, The Good Egg, The Couch Potato, The Sour Grape, The Smart Cookie) by Jory John & Pete Oswald (Character development, self-improvement, social skills)

Newer Favorites & Award Winners:

• Last Stop on Market Street by Matt de la Peña (Empathy, appreciating everyday beauty, Newbery Medal & Caldecott Honor)

• The Day the Crayons Quit by Drew Daywalt (Perspective-taking, creativity, humor)

• Dragons Love Tacos by Adam Rubin (Silliness, imagination, humor)

• Little Blue Truck by Alice Schertle (Friendship, helping others, animal sounds)

• No, David! by David Shannon (Consequences, rules, humor)

This list offers a great starting point for building a diverse and engaging library for preschoolers!