"Celebrating her forty-fifth birthday at her local pub, popular podcaster Alix Summers crosses paths with an unassuming woman called Josie Fair. Josie, it turns out, is also celebrating her forty-fifth birthday. They are, in fact, birthday twins. A few days later, Alix and Josie bump into each other again, this time outside Alix's children's school. Josie has been listening to Alix's podcasts and thinks she might be an interesting subject for her...

Nikki's best friends want to throw her a birthday part with cake, special invitations, and even a DJ. But when her mom claims the party is too expensive, Nikki thinks her birthday might be a bust.

"It's Karen's birthday! She can't wait for all those presents. Karen is even having two parties -- one at Daddy's house and one at Mommy's. But what Karen really wants for her birthday is one party, with her whole family together. Will Karen's birthday wish come true?"-

Henry and his big dog Mudge celebrate Henry's birthday with a piñata, a lively birthday party, and a cake shaped like a fish tank, making May first the best day ever.

Eva is planning a big sleepover for her "hatchday" celebration, but one of her friends, Sue, does not seem to want to attend--so Eva must find out what is bothering Sue, and help her get over her first-sleepover jitters.

"It's Froggy's birthday, but no one has remembered. His parents don't seem to realize it's his special day, and none of his friends are at home to wish him a happy birthday. Will Froggy celebrate his birthday all alone? Has everyone really forgotten?"--Provided by publisher.

"Rabbit needs to one, two, buckle her shoe and three, four, run out the door so she can help her neighbor Mommy Hen prepare a yummy surprise for the little pigs' birthday party. Meanwhile, Mommy Hen's four little chickes are causing mischief. Can you count to 20 with Rabbit and keep track of those sneaky chicks at the same time?"--

As spring arrives on Gardam Street, there are surprises in store for each Penderwick, from neighbor Nick Geiger's expected return from the war to Batty's new dog-walking business, but her plans to use her profits to surprise her family on her eleventh birthday go astray.

After her twelfth birthday, Rory checks off a list of things she is finally allowed to do, but unexpected consequences interfere with her involvement in the movie being shot at her school, while a weird prediction starts to make sense.

Twinkle's plans for an extra-special birthday party seemed ruined when a storm blows through the night before, tearing down decorations and raining on her cake.