The Books of Elsewhere Series by Jacqueline West, Lexy Fridell

Old Ms. McMartin is definitely dead. Now her crumbling Victorian mansion lies vacant. When eleven-year-old Olive and her dippy mathematician parents move in, she knows there's something odd about the place--not least the walls covered in strange antique paintings. But when Olive finds a pair of old spectacles in a dusty drawer, she discovers the most peculiar thing yet: She can travel inside these paintings to a world that's strangely quiet . . . and eerily like her own... moreOld Ms. McMartin is definitely dead. Now her crumbling Victorian mansion lies vacant. When eleven-year-old Olive and her dippy mathematician parents move in, she knows there's something odd about the place--not least the walls covered in strange antique paintings. But when Olive finds a pair of old spectacles in a dusty drawer, she discovers the most peculiar thing yet: She can travel inside these paintings to a world that's strangely quiet . . . and eerily like her own. Yet Elsewhere harbors dark secrets--and Morton, an undersized boy with an outsize temper. As she and Morton form an uneasy alliance, Olive finds herself ensnared in a plan darker and more dangerous than she could have imagined, confronting a power that wants to be rid of her by any means necessary. It's up to Olive to save the house from the dark shadows, before the lights go out for good. less

With no way into the McMartin house's magical paintings, and its three guardian cats reluctant to help, Olive's friend Morton is still trapped inside Elsewhere. So when Rutherford, the new oddball kid next door mentions a grimoire--a spellbook--Olive sees a glint of hope. If she can find the McMartins' spellbook, maybe she can help Morton escape Elsewhere for good. Unless, that is, the book finds Olive first. The house isn't the only one keeping secrets anymore . . .

In Olive's third adventure, what lurks below the house could be as dangerous as what's hidden inside . . . Some terrifying things have happened to Olive in the old stone house, but none as scary as starting junior high. Or so she thinks. When she plummets through a hole in her backyard, though, she realizes two things that may change her mind: First, the wicked Annabelle McMartin is back... moreIn Olive's third adventure, what lurks below the house could be as dangerous as what's hidden inside . . . Some terrifying things have happened to Olive in the old stone house, but none as scary as starting junior high. Or so she thinks. When she plummets through a hole in her backyard, though, she realizes two things that may change her mind: First, the wicked Annabelle McMartin is back. Second, there's a secret underground that unlocks not one but two of Elsewhere's biggest, most powerful, most dangerous forces yet. But with the house's guardian cats acting suspicious, her best friend threatening to move away, and her ally Morton starting to rebel, Olive isn't sure where to turn. Will she figure it out in time? Or will she be lured into Elsewhere, and trapped there for good? less

Olive thought she'd uncovered all the house's secrets. She was wrong.It's Halloween night when strangers come to Linden Street...and something dear to Olive goes missing... moreOlive thought she'd uncovered all the house's secrets. She was wrong.It's Halloween night when strangers come to Linden Street...and something dear to Olive goes missing. To what lengths will she go to get it back? Can she trust the strangers? Will she turn to a new and dangerous magic within the paintings of Elsewhere? Or will she put her faith in her own worst enemies to save the people and home she loves?The stakes grow higher, the secrets more dangerous, and mystery and magic abound as Olive, the boys, and the cats uncover the true nature of the house on Linden Street. less

The fifth and final book in The Books of Elsewhere.Annabelle McMartin is gone for good, but something worse lurks just out of sight--watching, waiting, preparing to strike. Then a field trip to the local art museum reveals a shock. What Olive discovers will create a chain of events that propel her to discoveries she may not wish to uncover, involving Morton's vanished parents and the very deepest, darkest roots of Aldous McMartin's creepy painted world... moreThe fifth and final book in The Books of Elsewhere.Annabelle McMartin is gone for good, but something worse lurks just out of sight--watching, waiting, preparing to strike. Then a field trip to the local art museum reveals a shock. What Olive discovers will create a chain of events that propel her to discoveries she may not wish to uncover, involving Morton's vanished parents and the very deepest, darkest roots of Aldous McMartin's creepy painted world. In this fifth and final book, Olive must seek the full, complex story of Elsewhere, its magical origins, and its creator, and in so doing, face her own fears and limitations--and possibly the destruction of Elsewhere itself. How far will Olive go to save the people and home she loves? And what will be the final cost? less