The Recurring Cast
Character · NUMA · 13 books

Dirk and Summer Pitt

Pitt’s adult twins · Clive Cussler

Dirk and Summer Pitt are Pitt’s grown-up twins, a marine engineer and an oceanographer who join NUMA.

Spoiler-free profile written for The Recurring Cast.

As an Amazon Associate I earn from qualifying purchases.

Character facts

First appearance
Valhalla Rising (2001)
Latest appearance
Obsidian Sky (2026)
Books
13 (12 major, 1 minor)
Series
Dirk Pitt
Author
Clive Cussler
Circle
NUMA

Where to meet Dirk and Summer Pitt

Dirk and Summer Pitt first appears in Valhalla Rising (2001), in a minor role, book 16 of the Dirk Pitt series.

Buy Valhalla Rising

Every book with Dirk and Summer Pitt

In publication order, with the size of their role in each.

  1. 2001·Valhalla Risingminor role · Dirk PittPitt learns they existBuy
  2. 2003MTrojan Odysseymajor role · Dirk PittBuy
  3. 2004MBlack Windmajor role · Dirk PittBuy
  4. 2006MTreasure of Khanmajor role · Dirk PittBuy
  5. 2008MArctic Driftmajor role · Dirk PittBuy
  6. 2010MCrescent Dawnmajor role · Dirk PittBuy
  7. 2012MPoseidon’s Arrowmajor role · Dirk PittBuy
  8. 2014MHavana Stormmajor role · Dirk PittBuy
  9. 2016MOdessa Seamajor role · Dirk PittBuy
  10. 2019MCeltic Empiremajor role · Dirk PittBuy
  11. 2021MThe Devil’s Seamajor role · Dirk PittBuy
  12. 2023MThe Corsican Shadowmajor role · Dirk PittBuy
  13. 2026MObsidian Skymajor role · Dirk PittBuy

Appears most often with

CharacterBooks together
Al GiordinoPitt’s best friend and partner13
Dirk PittNUMA special projects director, later its head13
Hiram YaegerNUMA’s computer genius13
James SandeckerAdmiral heading NUMA, later Vice President13
Loren SmithCongresswoman, later Pitt’s wife13
Rudi GunnNUMA deputy director13