All of Dickens’ major novels were published serially, in monthly (or weekly) installments. A full length novel was out of the price range of most of his readers, but a monthly installment, could be sold for a shilling and was thus, affordable.
Dickens wrote each installment with this type of publication in mind, many of the installments ended with a hook (cliffhanger) that kept the readers glued to the edge of their Victorian seats wondering what would happen next, thus ensuring the sales of the next installment.
Source: Charles Dickens Page
A Tale of Two Cities was written by Charles Dickens. It was published in 1859.