Order of Book Series
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Gregory O. Smith Books in Order

Gregory O. Smith has written 16 books, published between 2020 and 2025. The first book is The Treasure of the Lost Mine (2020) and the newest is The Secret Flight (2025). Publication order is the reading order below.

Books
16
Published
2020–2025
See all 16 books in order Printable Gregory O. Smith checklist

Gregory O. Smith writes for Grades 3-5, with 16 books catalogued from 2020 to 2025. The Treasure of the Lost Mine (2020) is the first title. Other 2020 books include Desert Jeepers, Reach for the Stars, Secret Agents Don't Like Broccoli, The Case of the Missing Princess, The Great Submarine Adventure and The Sword of Sutherlee. The Secret Flight (2025) is the newest, and Gregory O. Smith is still publishing.

How many Gregory O. Smith books are there?

Gregory O. Smith has 16 books, released between 2020 and 2025.

Gregory O. Smith Books in Publication Order

The table lists all 16 Gregory O. Smith books in the order they were published, with the release year and how many independent book listings confirm each title. Catalogue data as of September 2026.

  1. 1
    The Treasure of the Lost Mine2020 · confirmed 1/4
    2020–
    Buy at Amazon USAmazon UK
  2. 2
    Desert Jeepers2020 · confirmed 1/4
    2020–
    Buy at Amazon USAmazon UK
  3. 3
    The Secret of the Lost City2020 · confirmed 1/4
    2020–
    Buy at Amazon USAmazon UK
  4. 4
    The Case of the Missing Princess2020 · confirmed 1/4
    2020–
    Buy at Amazon USAmazon UK
  5. 5
    Secret Agents Don't Like Broccoli2020 · confirmed 1/4
    2020–
    Buy at Amazon USAmazon UK
  6. 6
    The Great Submarine Adventure2020 · confirmed 1/4
    2020–
    Buy at Amazon USAmazon UK
  7. 7
    Take to the Skies2020 · confirmed 1/4
    2020–
    Buy at Amazon USAmazon UK
  8. 8
    The Wright Cousins Fly Again2020 · confirmed 1/4
    2020–
    Buy at Amazon USAmazon UK
  9. 9
    Reach for the Stars2020 · confirmed 1/4
    2020–
    Buy at Amazon USAmazon UK
  10. 10
    The Sword of Sutherlee2020 · confirmed 1/4
    2020–
    Buy at Amazon USAmazon UK
  11. 11
    The Secret of Trifid Castle2020 · confirmed 1/4
    2020–
    Buy at Amazon USAmazon UK
  12. 12
    The Clue in the Missing Plane2020 · confirmed 1/4
    2020–
    Buy at Amazon USAmazon UK
  13. 13
    The Wright Disguise2022 · confirmed 1/4
    2022–
    Buy at Amazon USAmazon UK
  14. 14
    The Mystery of Treasure Bay2022 · confirmed 1/4
    2022–
    Buy at Amazon USAmazon UK
  15. 15
    The Secret of the Sunken Ship2022 · confirmed 1/4
    2022–
    Buy at Amazon USAmazon UK
  16. 16
    The Secret Flight2025 · confirmed 1/4
    2025–
    Buy at Amazon USAmazon UK

Gregory O. Smith books grouped by series

Each title below is a row in the publication-order table above. None of these groups has a reading-order page of its own on this site.

Standalone books

16 books

16 Gregory O. Smith titles here are not listed as part of any series.

Do you have to read Gregory O. Smith books in order?

No. No source lists any of the 16 Gregory O. Smith books here as part of a series. The numbered table above gives them by publication date.

Where to start with Gregory O. Smith

Start with The Treasure of the Lost Mine (2020), the earliest published title.

What is the newest Gregory O. Smith book?

The Secret Flight (2025) is the newest Gregory O. Smith book released so far.

Is there a new Gregory O. Smith book coming?

No next Gregory O. Smith book is announced in the catalogue, which is a gap in the listings it merges rather than a sign that the run has ended.

Gregory O. Smith at a glance

Still publishing
Gregory O. Smith published a book as recently as 2025.
Release pace
Gregory O. Smith books have appeared more than one a year on average.
Busiest decade
Most Gregory O. Smith books, 16 of 16, were published in the 2020s.