Undercover Girl
by Christine Harris
3.84 · 19 ratings
middle-grade · contemporary · sci-fi · political-intrigue · action-adventure · fiction · children-books · espionage · law-enforcement · mystery · book · children · female-mc · thriller · horror · realistic · comics · orphans · young-adult · alternate-universe
Undercover Girl: Similar series
The 39 Clues
by Peter Lerangis
4.03 · 561 ratings
action-adventure · mystery · fiction · book · fantasy · young-adult · realistic · children · children-books · middle-grade · historical-fiction · teens · family · espionage · audiobook · political-intrigue · suspense · orphans · law-enforcement · contemporary
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Alex Rider
by Anthony Horowitz
4.13 · 552 ratings
action-adventure · mystery · fiction · young-adult · book · law-enforcement · children · middle-grade · children-books · espionage · political-intrigue · audiobook · crime · contemporary · thriller · realistic · suspense · teens · male-mc · high-school
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Harriet the Spy
by Louise Fitzhugh
3.90 · 91 ratings
middle-grade · literary · classics · young-adult · book · female-author · realistic · children · fiction · children-books · mystery · feminism · political-intrigue · law-enforcement · historical-fiction · 20th-century · friendship · action-adventure · humor · espionage
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The 39 Clues: Cahills vs. Vespers
by Gordon Korman
4.15 · 165 ratings
fiction · mystery · fantasy · espionage · action-adventure · family · law-enforcement · historical-fiction · realistic · children · young-adult · book · audiobook · middle-grade · suspense · political-intrigue · friendship · teens · siblings · children-books
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Heist Society
by Ally Carter
4.12 · 148 ratings
crime · heist · espionage · fiction · action-adventure · humor · mystery · political-intrigue · contemporary · book · romance · young-adult · high-school · realistic · womens-fiction · teens · friendship · outlaws · law-enforcement · female-mc
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Moon Base Alpha
by Stuart Gibbs
4.36 · 70 ratings
book · young-adult · political-intrigue · audiobook · middle-grade · space · espionage · futuristic · fiction · action-adventure · children-books · humor · mystery · sci-fi · children · law-enforcement · realistic · suspense · family · friendship
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Masterminds
by Gordon Korman
4.33 · 66 ratings
friendship · outlaws · fiction · children-books · humor · mystery · action-adventure · family · law-enforcement · realistic · sci-fi · children · young-adult · book · audiobook · contemporary · middle-grade · dystopia · survival · cloning
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Genius
by Catherine Jinks
3.86 · 60 ratings
audiobook · contemporary · middle-grade · book · young-adult · sci-fi · realistic · crime · mystery · action-adventure · fiction · teens · humor · political-intrigue · suspense · cyberpunk · disability · 21st-century · anti-hero · boarding-school
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Spy School
by Stuart Gibbs
4.43 · 207 ratings
fiction · action-adventure · espionage · humor · mystery · law-enforcement · realistic · children · young-adult · audiobook · middle-grade · political-intrigue · children-books · thriller · book · friendship · contemporary · suspense · crime · historical-fiction
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Kiki Strike
by Kirsten Miller
4.12 · 55 ratings
urban-fantasy · children · young-adult · book · contemporary · middle-grade · political-intrigue · fantasy · action-adventure · fiction · mystery · espionage · crime · law-enforcement · paranormal · urban · female-mc · friendship · children-books · womens-fiction
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The 39 Clues: Doublecross
by Sarwat Chadda
4.31 · 72 ratings
audiobook · middle-grade · law-enforcement · historical-fiction · children · suspense · action-adventure · children-books · mystery · fiction · young-adult · book · family · historical · fantasy · crime · siblings · espionage · political-intrigue · male-author
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FunJungle
by Stuart Gibbs
4.38 · 124 ratings
book · middle-grade · animals · crime · fiction · action-adventure · children-books · humor · mystery · children · law-enforcement · realistic · young-adult · audiobook · contemporary · anthropomorphism · political-intrigue · espionage · friendship · outdoors
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NERDS
by Michael Buckley
4.15 · 82 ratings
espionage · audiobook · middle-grade · political-intrigue · children · sci-fi · action-adventure · children-books · humor · fiction · mystery · super-powered · young-adult · book · law-enforcement · realistic · family · contemporary · coming-of-age · time-travel
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I, Q
by Roland Smith
4.19 · 95 ratings
young-adult · book · middle-grade · political-intrigue · fiction · action-adventure · children-books · mystery · espionage · law-enforcement · children · suspense · crime · family · siblings · thriller · sci-fi · survival · exploration · friendship
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Gilda Joyce
by Jennifer Allison
4.06 · 79 ratings
action-adventure · fantasy · fiction · children-books · humor · mystery · children · law-enforcement · horror · book · ghosts · supernatural · young-adult · paranormal · audiobook · middle-grade · psychics · realistic · low-fantasy · magical-realism
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City Spies
by James Ponti
4.40 · 91 ratings
realistic · law-enforcement · contemporary · audiobook · middle-grade · children · political-intrigue · fiction · young-adult · action-adventure · children-books · friendship · mystery · crime · book · espionage · family · suspense · poc-mc · thriller
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Diamond Brothers
by Anthony Horowitz
4.00 · 88 ratings
crime · humor · action-adventure · children-books · fiction · mystery · children · law-enforcement · book · young-adult · comedy · noir · audiobook · investigator · middle-grade · espionage · 20th-century · historical · horror · political-intrigue
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Nancy Drew: Girl Detective and the Hardy Boys: Undercover Brothers Super Mystery
by Carolyn Keene
4.07 · 42 ratings
young-adult · children-books · children · law-enforcement · middle-grade · mystery · male-mc · female-mc · suspense · contemporary · fiction · action-adventure · book · south-europe · italy · europe · family · urban
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Nancy Drew: Girl Detective
by Carolyn Keene
3.84 · 376 ratings
children · law-enforcement · fiction · children-books · mystery · book · action-adventure · middle-grade · young-adult · female-mc · contemporary · crime · audiobook · investigator · realistic · classics · amateur-sleuth · womens-fiction · literary · central-america
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Lawless
by Jeffrey Salane
4.00 · 21 ratings
high-school · children · political-intrigue · middle-grade · law-enforcement · book · espionage · action-adventure · fiction · children-books · mystery · sci-fi · young-adult · humor · female-mc · survival · realistic · secrets · audiobook · crime
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Kensy & Max
by Jacqueline Harvey
4.38 · 34 ratings
children-books · mystery · children · action-adventure · sci-fi · law-enforcement · contemporary · middle-grade · audiobook · family · book · fiction · young-adult · bodyguard · season-summer
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Urban Outlaws
by Peter Jay Black
4.25 · 24 ratings
children · sci-fi · middle-grade · book · action-adventure · fiction · children-books · crime · law-enforcement · heist · young-adult · mystery · contemporary · friendship · political-intrigue · suspense · dystopia · realistic · technology · family
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Undercover Girl
by Christine Harris
3.84 · 19 ratings
middle-grade · contemporary · sci-fi · political-intrigue · action-adventure · fiction · children-books · espionage · law-enforcement · mystery · book · children · female-mc · thriller · horror · realistic · comics · orphans · young-adult · alternate-universe
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Spy Gear Adventures
by Rick Barba
4.00 · 8 ratings
fiction · sci-fi · book · children · friendship · law-enforcement · action-adventure · children-books · mystery · espionage · political-intrigue · suspense · young-adult
All books in this series ❯