Books are too expensive to buy every week in any quantity greater than 1.
I read 7-12 new books a week to my son, I'd go bankrupt if it wasn't for libraries.
(We typically read 5-10 books a day, ur the 12 books we get from the library each week have an uneven distribution of what gets read again and again).
Presumably as my son gets older we'll move to books that take longer to read and the absolute # will go down.
Back when I was single and didn't have a kid, I'd go through 2 or 3 long form fiction books a week. At that point in life, Half Priced Books (the book store chain with that name) was my financial savior.
Books are expensive. A kids picture book is easily $15-$20, with outliers costing even more. Whenever I do go book shopping with my son we end up spending almost $200.
Because I buy them every week. So does my wife. I guess we are No One.