How many books are approved a day - here are some stats

Do you want to know why it is taking forever to get your iBook approved? Do you wonder how many books are actually approved per day? I was asking myself the same question and because Apple doesn't release any numbers, I monitored the numbers on the iBookstore recently to get an idea.
Here are the numbers (just to get a rough idea, not scientifically proven)
The iBookstore has finally a feature that lets you browse only iBooks (aka Multi-Touch Books). It displays the numbers of all available Paid and Free iBooks. That is what I was monitoring each morning.
When I started to monitor the iBookstore on May15th it had a total of 3,217 iBooks. If you use January 19th as the start date, then Apple would have approved an average of 26 books a day.
Now here is a table where I wrote down the number from the iBookstore each morning of that day. The two columns next to it show the difference (how many approved that day) and the total number of approved iBooks (paid and free)
There are a few interesting conclusions you can draw from the numbers.
* You see a drop over the weekend. Maybe that is proof that the department is located in the US and not in China or India.
* The approval numbers fluctuate but the average is about twice as high as the 26 books from the original start. So they must have hired more staff (or reading faster)
* Interesting that there was a big junk of free iBooks yanked off the bookstore
Another unscientific info about the bestseller ranking from my own stats.
With about 10 sales a day I land in the 30s rank.
WIth about 2 sales a day it ranges from number 50-100
Those numbers fluctuate wildly and I'm sure there are other factors (i.e. total sales) in that calculation.
It would be interesting to hear numbers and experiences from other users.
Edgar Rothermich
DingDingMusic.com

I looked up the number of book titles per category in Apple's and Amazon's bookstores yesterday:
Category
Amazon
Apple
Percent
Professional & Technical
107804
360619
26.98%
26.98%
Fiction & Literature
20700
227773
17.04%
44.02%
Reference
49942
95433
7.14%
51.16%
Business & Personal Finance
78007
76608
5.73%
56.89%
Halth, Mind & Body
63303
4.74%
61.63%
History
244585
51904
3.88%
65.51%
Religion & Spirituality
123177
49448
3.70%
69.21%
Romance
82851
48581
3.63%
72.85%
Children & Teens
67825
47718
3.57%
76.42%
Nonfiction
46908
3.51%
79.93%
Mysteries & Thrillers
64773
41776
3.13%
83.05%
Sci-Fi & Fantasy
60828
39861
2.98%
86.03%
Arts & Entertainment
71065
37874
2.83%
88.87%
Biographies & Memoirs
60365
33643
2.52%
91.38%
Science & Nature
87395
27825
2.08%
93.47%
Computers & Internet
29770
17558
1.31%
94.78%
Politics & Current Events
33551
17461
1.31%
96.09%
Travel & Adventure
21181
11874
0.89%
96.97%
Cookbooks, Food & Wine
8593
0.64%
97.62%
Sports & Outdoors
20909
8443
0.63%
98.25%
Lifestyle & Home
73509
8082
0.60%
98.85%
Humor
30506
7265
0.54%
99.40%
Comics & Graphic Novels
4559
0.34%
99.74%
Parenting
27879
3407
0.25%
99.99%
Textbooks
100
0.01%
100.00%
1356622
1336616
These numbers are upper bounds, as book titles can be in up to three categories. So the real number of unique titles is probably closer to 1/3 or 1/2 of the 1.33 million, which is close to K T's 700,000 number.
Amazon and Apple are similar in total number of titles (with a few different categories). I had expected there to be much less titles in the Apple bookstore compared to Amazon. So selection size isn't much of a differentiator anymore. That said, number of sales are still far higher in the Amazon store. Many early eBook adopters still prefer their Kindle over the iPad when looking for new eBooks.

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