"Ali Cross and his friends chase police cases while Ali is caught up in a debate about policing"--

"When eleven-year-old Maizy finds a box of vintage Nancy Drew books, her mysterious discovery uncovers a truth from the past that will lead to self-discovery in the present, connecting three generations of women"--

"Third-grader Aven Green has been solving mysteries for a whole month, cracking such cases as The Mystery of the Cranky Mom. But can this perceptive detective solve two cases at the same time? First her teacher's lunch bag disappears. Then Aven's great-grandma's dog goes missing. Fortunately, since Aven was born without arms, all the "arm" cells went to her super-powered brain instead. (That's her theory.)"--

It's the first day of the fourth grade at Arthimos Elementary and things are already off to a strange start--poisonous cookies, a zipline disaster, a missing iPad, and what are those strange sounds coming from the school custodian's wheelbarrow? Luckily the Prime Detectives--Abby "the Abacus" Feldstein, Cameron "Cam" McGill, and Gabriel "Gabe" Kim--are on the case! Using arithmetic, geometry, and logic, the Prime Detectives are sure to figure out...

"Fifth grader Kate the Chemist is chosen to be the assistant director of the school play Dragons vs. Unicorns and has to use her science knowledge to find out who is trying to sabotage the show."--

"Twelve-year-old Hazel Woods has always had an unusual knack for sleuthing. So, when she not-so-accidentally overhears her brother Den planning to sneak into the cemetery at night for an epic game of hide-and-seek, she decides to secretly tag along. This seems like the perfect opportunity to investigate the claims that the cemetery is haunted. But the moment the game ends, Hazel realizes something is very, very wrong. From her hiding spot in the bushes,...

"Colin and Nevaeh are great at finding things. After all, they found each other and became best friends--even though their parents are business rivals. They also found hidden boxes of secret letters, which led them to unravel mysteries about kids from the 1970s. But when they started Mystery Solvers Inc., they didn't expect to be asked to find a ghost. Ree recruits them to investigate a series of old, spooky photos left behind in her family's new...

Ali Cross is determined to follow in the footsteps of his father, former detective and FBI agent Alex Cross. When Ali's best friend Gabe goes missing, Ali knows that with every passing day, the less likely Gabe will be found. This is Ali's very first case. If he inherited any of his dad's detective skills, it's time for them to kick in! -- adapted from jacket

On a trip to New York City to visit Randi's aunt, the ninja detective trio explores Randi's old neighborhood in Brooklyn, where they uncover an art heist involving Fabergé eggs. Except no one will believe them. So they'll just have to catch the criminals in the act...

"London, 1889. A woman is being held prisoner while she awaits a forced marriage. Another has been kidnapped, and yet another disappears. As Enola seeks to rescue the three women, her brother embarks on a quest of his own. When Sherlock receives a mysterious package, he knows he'll need Enola's help to decipher its meaning. In the end, the three Holmes siblings will have to work together to answer the question that started it all: What happened to...