When it comes to San Francisco preschools, Irene Byrne knows all. She wrote the book (literally).

Her new self-published guide, Preschools by the Bay, acts as balm for anxiety-addled parents pushed to the limits by an admissions process that’s only slightly less painful than labor and delivery.

Byrne (who, as long-time director at Phoebe A. Hearst Preschool Learning Center, is the consummate insider) takes you through the seemingly mysterious and stressful system with a steady hand. Besides detailed listings of 80 licensed schools and a handy, just-the-facts spreadsheet, the book includes several short articles on topics such as tour do’s and don’ts, questions to ask, and things to look for, as well as checklists.

It really does make the whole thing seem manageable.

And here’s hoping she writes a guide for that next crazy hurdle — kindergarten.

Available online at phoebehearstpreschool.org, $27.

HEAR
Books, Rhymes, and Story Times
What: At last, the Presidio library branch is open; story time resumes in the brand new community room.
Why: The renovated library is near cool parks, DayOne, and Right Start.
When: Tues., 10:15-10:45 a.m.
Where: San Francisco Public Library - Presidio, 3150 Sacramento St., b/t Lyon & Baker Sts. (415-355-2880).

BOND
Just-for-Dads Baby Development Class
What: Papas learn about all things infant.
Why: Like father, like son (and daughter).
When: Sat. Rolling and crawling, 1-2:30 p.m.; newborns, 3-4:30 p.m.
Where: Carmel Blue, 1418 Grant Ave., b/t Union & Green Sts. (415-362-2583). Cost is $39.

PLAY
Sunday Streets on the Great Highway
What: The free city program that shuts down roadways just for fun has got an ocean view.
Why: Go ahead and let kiddo run (bike or skate) in the street.
When: Sun., 11 a.m.-4 p.m.
Where: Great Hwy., b/t Sloat Blvd. & Lincoln Way.

Photo: Katherine Cho Photography / Getty Images