David A Adler: 99 books

It's field trip day in Cam and Eric's class. Only where is Eric's permission slip? He had it on the bus, but now it's gone! Did someone take it? Did it blow away? After a few red herrings, Cam's click-click memory kicks in just in time for Eric to join the class on their field trip to the zoo. Perfect...

Cam and her classmates have a forgetful substitute teacher. First, he forgot the homework assignment. And where did he put his jacket? But when his car keys and cell phone go missing, everyone starts to wonder: did he lose them or were they stolen? Readers will love to click along with Cam as she solves this latest easy-to-read mystery.

At a pizza parlor, Cam Jansen's jacket disappears. Could someone have taken it? Where could it be? Find out when Cam's amazing memory clicks into action in the sixth book of the Young Cam Jansen series.

Cam and her friend Eric are having a great time at the circus with Aunt Molly - that is, until their box of popcorn goes missing. Did they lose it, or was it stolen? It's up to Cam and her photographic memory to figure it out!

Jeffrey Bones's teacher, Mr. Gale, loses things a lot. One day, Mr. Gale says he can't find Bones's math test, but Bones knows he turned it in. It's time for him to use his detective skills. Can Bones find his test and get an "excellent? grade"?

It's up to Cam to solve this disappearing act! Aunt Molly takes Cam and her friend Eric to see a magic show at Teddy's Toys. During the show, Teddy's bird, Oscar, disappears! Where could he have gone? It's up to Cam to click! and find Oscar before he gets lost in the mall in this Level 3 easy-to-read mystery.

Cam Jansen and her friends meet in the park to play baseball, but when their ball gets lost, it looks like the game may be over. Cam has a picture in her head of everything she has seen, and she says "click" whenever she wants to remember something. But does she have the picture she needs to find...

A field trip to the zoo is fun for Cam Jansen and her classmates—until lunchtime. Everyone else’s sandwich is safely delivered, but Danny can’t find his anywhere! Only Cam and her amazing memory can crack this mystery.

Detective Jeffrey Bones is having fun eating cake and watching a clown perform tricks at his friend's birthday celebration. But when the clown can't find her street clothes at the end of the party, it's up to Bones to solve this Easy-to-Read mystery!

You had better not monkey around when it comes to place value. The monkeys in this book can tell you why! As they bake the biggest banana cupcake ever, they need to get the amounts in the recipe correct. There’s a big difference between 216 eggs and 621 eggs. Place value is the key to keeping the...

There's a new girl in school! Her name is Jenny and she is makingfast friends with Cam and Eric. They're happy to help her find her way around, but when it's time for gym class, Jenny disappears. Where did she go? Is she lost? Did she go back to her old school? Young readers won't be able to resist...

Boo! There is a mystery behind every door of the creepy haunted house. Luckily, algebra will help you solve each problem. By using simple addition, subtraction, mulitplication, and division, you'll discover that solving math mysteries isn't scary at all -- it's fun!

Who catnapped Little Tiger? And why would someone want to steal a helpless woman?s cat? Cam Jansen is the only one who can identify the suspect. Now it?s up to Cam and her photographic memory to solve this frisky mystery.This new Cam Jansen adventure includes?for the first time?a visual puzzle for...

No mystery is too great for super-sleuth Cam Jansen and her amazing photographic memory! Mysteries follow super-sleuth Cam Jansen everywhere she goes...even to the museum. Cam and her class are on a fild trip at the museum when Cam discovers that some bones are missing from a dinosaur skeleton....