Into Thin Air (1991)
by Carolyn Keene
(#57 in Nancy Drew Files)

Secrets Can Kill

Deadly Intent

Murder On Ice

Smile and Say Murder

Hit and Run Holiday

White Water Terror

Deadly Doubles

Two Points to Murder

False Moves

Buried Secrets

Heart of Danger

Fatal Ransom

Wings of Fear

This Side of Evil

Trial by Fire

Never Say Die

Stay Tuned for Danger

Circle of Evil

Sisters in Crime

Very Deadly Yours

Recipe for Murder

Fatal Attraction

Sinister Paradise

Till Death Do Us Part

Rich and Dangerous

Playing with Fire

Most Likely to Die

The Black Widow

Pure Poison

Death by Design

Trouble in Tahiti

High Marks for Malice

Danger in Disguise

Vanishing Act

Bad Medicine

Over the Edge

Last Dance

The Final Scene

The Suspect Next Door

Shadow of a Doubt

Something to Hide

The Wrong Chemistry

False Impressions

Scent of Danger

Out of Bounds

Win, Place or Die

Flirting with Danger

Date With Deception

Portrait in Crime

Deep Secrets

A Model Crime

Danger For Hire

Trail of Lies

Cold As Ice

Don&#039;t Look Twice

Make No Mistake

Into Thin Air

Hot Pursuit

High Risk

Poison Pen

Sweet Revenge

Easy Marks

Mixed Signals

Wrong Track

Final Notes

Tall, Dark and Deadly

Nobody&#039;s Business

Crosscurrents

Running Scared

Cutting Edge

Hot Tracks

Swiss Secrets

Rendezvous in Rome

Greek Odyssey

A Talent For Murder

The Perfect Plot

Danger on Parade

Update on Crime

No Laughing Matter

Power of Suggestion

Making Waves

Dangerous Relations

Diamond Deceit

Choosing Sides

Sea of Suspicion

Let&#039;s Talk Terror

Moving Target

False Pretenses

Designs in Crime

Stage Fright

If Looks Could Kill

My Deadly Valentine

Hotline to Danger

Illusions of Evil

An Instinct for Trouble

The Runaway Bride

Squeeze Play

Island of Secrets

The Cheating Heart

Dance Till You Die

The Picture of Guilt

Counterfeit Christmas

Heart of Ice

Kiss and Tell

Stolen Affections

Flying Too High

Anything for Love

Captive Heart

Love Notes

Hidden Meanings

The Stolen Kiss

For Love or Money

Wicked Ways

Rehearsing for Romance

Running Into Trouble

Under His Spell

Skipping a Beat

Betrayed by Love

Against the Rules

Dangerous Loves

Natural Enemies

Strange Memories

Wicked for the Weekend

Crime at the Chat Café