📖 About Thorn P.I.

Thorn P.I. is a series universe written by Glenna Sinclair. The complete collection runs to 10 books across 1 series, published between 1987 and 2008.

The main series is Publication Order of Thorn Books with 10 books. It opens with Under Cover of Daylight (1987) and currently runs to Hell's Bay (2008).

Series included on this page:

🎯 Where to Start with Thorn P.I.

New readers should begin with the first book of the main series in publication order: Under Cover of Daylight (1987), book 1 of Publication Order of Thorn Books. Reading in publication order lets the world and characters develop the way the author intended, and it avoids spoilers that later books may contain.

Each of the 1 series on this page is expandable — click a series heading to see every title it contains, in order, with a direct link to buy the book on Amazon.

📚 Thorn P.I. Books in Order

Publication Order of Thorn Books
10 books
1
Under Cover of Daylight book cover1Under Cover of Daylight1987Buy on Amazon
Tropical Freeze book cover2Tropical Freeze1989Buy on Amazon
Mean High Tide book cover3Mean High Tide1994Buy on Amazon
4Gone Wild1995Buy on Amazon
Buzz Cut book cover5Buzz Cut1996Buy on Amazon
6Red Sky at Night1997Buy on Amazon
Blackwater Sound book cover7Blackwater Sound2002Buy on Amazon
Off the Chart book cover8Off the Chart2003Buy on Amazon
9Magic City2007Buy on Amazon
Hell's Bay book cover10Hell's Bay2008Buy on Amazon

❓ Frequently Asked Questions

How many Thorn P.I. books are there?
There are 10 books in the Thorn P.I. collection, organised into 1 series and published between 1987 and 2008.
What is the first Thorn P.I. book?
The first book is Under Cover of Daylight, published in 1987.
What order should I read the Thorn P.I. books in?
Most readers use publication order, which is the order the books were originally released. A chronological order is also provided on this page for readers who prefer to follow the internal timeline of the story.
Who wrote the Thorn P.I. books?
The Thorn P.I. books were written by Glenna Sinclair.
Is the Thorn P.I. series finished?
The main series, Publication Order of Thorn Books, has 10 books so far. The most recent title listed on this page gives the current end point of the series.
When did the Thorn P.I. series start?
The earliest title in this collection was published in 1987, and the most recent in 2008.