A to Z Mysteries  grade 3 reading level
These fast-paced mysteries are suspenseful and feature three children who are in third grade.  A good series to read after Magic Treehouse

Amber Brown   grade 2-3 reading level
Amber Brown is funny and appealing and the plots revolve around problems with friends, school, her name and her parents’ divorce.  Amber is a third grader.

Amelia Bedelia  grade 2 reading level 
Amelia Bedelia takes everything literally with humorous results.

Andrew Lost  Ages:7-10   grade 2 reading level
Gross enough to interest boys but lots of well-researched science.  Each ends with a cliff-hanger.

Bailey School Kids  grade 3 reading level
Short chapters with pictures make this appealing.  In each book, an adult is suspected to be an imaginary creature like Frankenstein, aliens, gremlins, dracula, or such.  Clues do point the way to a rational explanation. 

Cam Jansen   grade 2 reading level
Cam Jansen uses her photographic memory to solve cases that are less complicated which makes them within the reach of the younger reader.  Short chapters help.

Captain Underpants  Ages:7-10   grade 4 reading level
Hilarious superhero in the history of elementary school.

Capital Mysteries   Ages: 4-8   grade 3 reading level
Mysteries which take place in our nation’s capital.  Written by author of A to Z Mysteries

Dragon Slayers’ Academy Ages:7-10  high grade 2 reading level
Wizards, dragons, a secret princess, a pig who speaks Pig Latin, and a hero who is served boiled eel on a bun.  What more can you ask for?
 
Geronimo Stilton Ages:7-10  grade 3 reading level
Hilarious adventures but check out the text- lots of fun

Henry and Mudge   grade 2 reading level
Mudge is a 180 pound dog who is Henry’s best friend.  The text is simple and rhythmic and humorous.

Horrible Harry  grade 2 reading level
Set at school with lots of mischief. 

Jigsaw Jones grade 2 reading level
Second-grade detective Jigsaw Jones and his partner have an eye for detail and a top-secret detective journal.  Lost coins, missing hamsters, haunted houses are all cases solved by the duo. 

Judy Moody Ages:6-10  grade 3 reading level
A 3rd grader with attitude and a mood to fit every occasion. 
 
Junie B. Jones Ages: 4-8  grade 2 reading level
Junie is an exuberant kindergartner who is always in trouble.  The sentences are short and the ideas are easily understood. 

Katie Kazoo Switcheroo Ages:7-10  grade 3 reading level
A 3rd grader with a secret. Never a dull moment with Katie. 
 
Magic Tree House  Ages: 4-8  grade 2 reading level
Travel through time with lots of danger and lots of history. Usually this is the first chapter book that children pick up. 

Nate the Great  grade 2 reading level
Engaging mysteries for those just starting reading chapter books.  Nate and his dog Sludge solve classic mysteries. 

Rainbow Magic Ages: 4-8 grade 2 reading level
Fast paced adventures involving rescuing the weather fairies from the evil clutches of Jack Frost's mean goblins. Great beginning chapter books.

Secrets of Droon Ages:7-10  grade 3 reading level
The action is fast and whimsical in this fantasy realm.