The Secrets of Angling was a book written by John Dennys. It was the earliest English poetical treatise on fishing, first published in 1613 in London. A didactic pastoral poem in 3 books, in the style of Virgil's Georgics. It was published in 4 editions until 1652, examples of which are amongst the rarest books in existence.

Dennys's poem was published anonymously, 4 years posthumously, and for 198 years the poem was misattributed, its authorship remaining a mystery until 1811.

First published in 1613, Dennys's book was published after his death. The author was identified by the initials J.D., and had been attributed to up to 6 poets. In 1811 the authorship was determined from a "23mo Martii, 1612" (i.e., 1613) entry in the Stationers' Registers, which showed that Dennys authored the book. The Secrets of Angling was published in 4 editions, the last in 1652, and copies are amongst the rarest books in existence.

The Secrets of Angling was the earliest English poetical treatise on fishing. Morgan George Watkins stated that the "tone of the poem is religious. It is full of lofty sentiments and natural descriptions, a poetical atmosphere surrounding even the commonest tools of the angler's craft."

The first edition contained a dedication by "R.I."(Roger Jackson who was the publisher) to John Harborne of Tackley, County of Oxford, whom he called "My much respected friend."

A didactic pastoral poem in 3 books, totaling 151 verses each of 8 lines, in the style of Virgil's Georgics.

The following is the first verse of Book 1:

The work contains what is thought to be the first printed description of a reel: