fibonacci sequence

Fibonacci Day

Fibonacci Day

I have a post up on SleuthSayers today, which is the day after Thanksgiving here in the United States. Since it’s been a busy week, I’m repurposing a post I wrote back in 2010 for another site. I’ve always liked this article, and I’m glad to have reclaimed it and updated it slightly for a new audience. Here’s how it opens:

Yesterday was Thanksgiving in the United States. But if you happen to be an American mathematician, yesterday was more than just turkey and families. It was Fibonacci Day, so named because the month and date—in American notation, anyway—expressed the first four digits in the famous number sequence: 1, 1, 2, 3. (Oh, to have been alive on 11/23/58!) To talk about that, I’m repurposing an article I wrote years ago for a website that has since gone dark.

My Fibonacci book @ Dali Museum

This was a cool. One of my bookseller friends, Caroline (above) spotted my Fibonacci book on sale (in copious quantities) at the Salvador Dali Museum in St. Petersburg, Florida. The artist Dali referenced the Fibonacci Sequence in many of his works.…

This was a cool. One of my bookseller friends, Caroline (above) spotted my Fibonacci book on sale (in copious quantities) at the Salvador Dali Museum in St. Petersburg, Florida. The artist Dali referenced the Fibonacci Sequence in many of his works. I love when one of my books connects with a museum gift shop. Their priorities are vastly different from traditional bookstores, and they’ll keep a book in stock long after the other stores have returned them and moved on.

* * *

Meanwhile, Caroline’s employer, Malaprops, is in the news this evening. This New York Times article announces that they are one of more than 50 indie bookstores that will receive a grant from mega-author James Patterson.

Blockhead is now a First Book

I got a nice surprise last week. My math picture book, Blockhead: The Life of Fibonacci has been accepted into the First Book Program.

First Book is a nonprofit org that helps teachers and schools buy books for kids in need. First Book makes tons of titles available to select schools at astounding discounts of 50 to 90 percent below retail. That’s a huge discount. I was clicking through First Book’s online store and I came across brand-new books by major authors that are going for as little as a buck a book. That price is only available if the teacher or school has been vetted and accepted into the First Book program.

When Blockhead first came out, I used to get emails from teachers, parents, and librarians asking if I could donate a book to a classroom or library, because they just didn’t have the funds to do so.

That’s a hard thing to ask of an author. In the first place most of us just don’t have the money to help schools out in this way. For a while I donated a few, but it wasn’t something I could keep up forever. While I do get a discount from the publisher, every book I mail out costs me darn near retail price by the time I cover the distributor’s sales tax and shipping and my own re-shipping. It just wasn’t smart for me to continue doing that, as much as I want kids to have my book. On top of the cost, authors like me are simply not equipped to assess whether a school or library is truly needy. No matter what I did, I felt guilty.

LaToniya A. Jones loves her kids—with math!

A few years ago, I did a Skype visit with some classes led by LaToniya A. Jones, a former middle school principal and math specialist in Detroit who founded an 501c3 organization called P.O.W.E.R., which, among other things, runs workshops to teach parents how they can empower their kids through math. LaToniya, who uses a bunch of “math-lit” books in her seminars, wrote to First Book, asking that they add Blockhead to their menu of titles.

I’m really touched and glad that she did that. I had heard of First Book, but it would not have occurred to me that I could propose that the org make my book available. When Blockhead finally hits the First Book store, I’ll add the link to my site permanently so teachers and librarians will know that they have options that are cheaper than even the big online retailers. (If you are a children’s book author, you might consider looking into First Book.)

In any case, thanks, First Book. Thanks, Ms. Jones!


Yes, I am trying to post here more often. Thank you for noticing. If you want to sign up for my newsletter and claim your free ebook, go here. Thanks — Joseph D’Agnese

My Fibonacci book mentioned on public radio show Harmonia Early Music

My Fibonacci book got an unexpected plug today on the website of the nationally syndicated public radio program Harmonia Early Music. The program occasionally chooses dates in history at random and provides a little history and music about what was going on then.

Harmonia’s chosen year 1250 was a bad one for Fibonacci. It’s the year he most likely died, during an occurrence of the plague in Pisa, Italy. The program’s audio is lushly scored; you can check out the mp3 at the link above. The written transcript is here, along with the link to my book.

2018 Update: Indiana Public Radio’s permalink omits the transcript, music playlist, and the reference to my book, but you can still listen to the audio of the show.