''Alpha Force'' is a ten book {{action adventure series}} written by former SAS member Chris Ryan. The story revolves around five teenagers- [[TheLeader Alex]], [[ActionGirl Li]], [[{{Badass}} Paulo]], [[PlayfulHacker Hex]] and [[JerkWithAHeartOfGold Amber]]- who after being shipwrecked on a desert island and working together to escape it, form an elite team dedicated to fighting crime throughout the world.

The series ran from 2002-2005, with ''Survival'' being the first book and ''Untouchable'' being the last.

!!This series provides examples of:

* ActionGirl: Li and Amber.
* AndTheAdventureContinues: The series ends with all of the team getting invitations to [[spoiler: join MI5.]]
* AsianAndNerdy: Subverted with Li; apart from her wide knowledge of animals and extreme sports she's just as smart as the rest of the team.
* AuthorAppeal: Alex's training from his SAS father and his motivation to be in the army.
* BelligerentSexualTension: Amber and Hex.
* BigBrotherInstinct: Partly the reason why Hex is working on the Phoenix in ''Survival''; he broke into a gym teacher's bank account because the guy was picking on his little brother, so they sent Hex to the Phoenix as punishment.
* BlackAndWhiteMorality: Alpha Force are good, and whatever BigBad of the week they're fighting are bad.
* BuriedAlive: Hex and Paulo in ''Desert Pursuit'', then Hex again in ''Fault Line''.
* ConvenientlyAnOrphan: Deconstructed with Amber, as the trauma from her parent's death causes her to lash out at others. Once she learns that they died for a good cause she's able to get over it.
* TheCharmer: Paulo, except towards [[ShipTease Li]].
* {{Cowboy}}: Paulo, of the 'Working Cowboy' variety.
* TheCracker: Amber mistakenly believes [[PlayfulHacker Hex]] is one. He's quick to correct her.
* CrazyPrepared: Alex, who constantly carries around his small survival kit. Justified since his father is a SAS agent, and he tends to travel a lot in barren areas.
* DarkSkinnedBlonde: Amber.
* DeadpanSnarker: All of them have their moments, though Alex and Hex are the most prominent.
* DesertedIsland: ''Survival'' is set on one.
* DontYouDarePityMe: Amber is diabetic, but the others learn quickly not to treat her any differently because of it.
* DrugsAreBad: ''Rat Catcher'' and ''Untouchable'' both emphasise this.
* EmbarrassingFirstName: Hex's real first name is [[spoiler: Melvin.]]
* FireForgedFriends: The team don't really bond until they're forced to survive together on a desert island.
* FiveManBand:
** TheHero: Alex, despite also being TheQuietOne.
** TheLancer: Li
** TheBigGuy: Paulo. Atypical for this trope, he's also TheMedic.
** TheSmartGuy: Hex
** TheChick: Amber
* FunWithAcronyms: The first letter of all their names spells out 'Alpha', [[ContrivedCoincidence which just happens to be the opposite of Amber's Omega necklace]].
* GenkiGirl: Li.
* HalfwayPlotSwitch: Often the team will be visiting a country to deal with one problem, only to learn there's another, bigger problem at hand.
* KnifeNut: Alex. He always carries his knife around, and can pin a wasp to a tree from fifty feet away.
* TheLoad: Hex thinks himself this in ''Survival'', since his technological skills aren't very handy on a remote island.
* MissionControl: John Middleton, Amber's uncle.
* MultinationalTeam: Alex and Hex are English, Paulo is Argentinian, Li is Anglo-Chinese and Amber is American.
* OopNorth: Alex is from North Cumbria.
* RichBitch: Amber was this at first. She gets better.
* ShownTheirWork: Every book will have a situation that Chris Ryan has either thoroughly researched or been through himself.
* SweetPollyOliver: Li disguises herself as a boy in ''Desert Pursuit'' so she can get close to the slave traders. Later in the book Alex and Hex perform a brief [[DisguisedInDrag inversion]].
* TrueCompanions: Alpha Force, starting at the end of ''Survival''.
* UnresolvedSexualTension: While Li and Paulo are obviously attracted to each other, they never properly get together in the story.
* VitriolicBestBuds: The entire team is Type II to each other.
* WhyDidItHaveToBeSnakes:
** Hex develops claustrophobia in ''Hostage''. Afterwards him being trapped in enclosed or dark places happens nearly once a book.
** In ''Hunted'', [[spoiler: Li suffers from a fear of heights after seeing her old climbing instructor fall during abseiling and break her back. She gets over it eventually.]]