Could you please check these sentences, Writeacher? Thank you.

1) Samuel Richardson was born into a Puritan middle-class family.
He moved to London quite young, and there started working as a printer.
2) At the age of 51, when he was one of London's most reputable and prosporous printers, he unexpectedly turned novelist (to story-telling?):
3) In 1740 he published Pamela, an epistolary novel about a young servant who is persecuted by her master, a young nobleman.
4) The book was immensely successful but it also caused a great debate in England for the way it represented the relationships between the different social classes.
5) In his old age Richardson was revered as a great novelist and a public figure.
6) Pamela is the first psychological novel written in English. The reader is taken inside the mind of Pamela and is invited to share her innermost thoughts and moods.

The sentences you provided are mostly correct, but there are a few minor corrections that can be made for clarity and grammatical accuracy. Here are the revised sentences:

1) Samuel Richardson was born into a middle-class Puritan family. He moved to London at a young age and began working as a printer there.

2) At the age of 51, when he was one of London's most reputable and prosperous printers, he unexpectedly transitioned from printing to becoming a novelist.

3) In 1740, he published Pamela, an epistolary novel that revolves around a young servant who is persecuted by her master, a young nobleman.

4) The book was immensely successful, but it also sparked a great debate in England due to its portrayal of the relationships between individuals from different social classes.

5) In his old age, Richardson was highly regarded as a significant novelist and a prominent public figure.

6) Pamela is considered to be the first psychological novel written in English. The reader is immersed in Pamela's mind, invited to share her innermost thoughts and moods.

These revisions clarify the points you were making in your original sentences. Well done!