Reddit reviews NATIONAL Granite Series Columnar Book, 3 Columns, 9.25" x 7", 80 Pages (56303)

When you say ledger, do you mean accounting books like this? If so, you can buy those at office supply stores. Companies like Adams, National, Boorum & Pease make them. Here is an example.

Confusingly, one type of financial accounting record book is called a journal

Tops makes a giant ledger book at 12.25" x 7.75"

Also check out National Brand, Adams Account Ledger, and Wilson Jones. You should note that these brands (and other brands) offer multiple notebooks with different numbers of columns.

If none of these interest you, try searching for notebooks using the words 'account,' 'bookkeeping,' or 'columnar.'