The polter-ghost problem / Betsy Uhrig.

Enhanced descriptions from Syndetics:

Three best friends discover a haunted orphanage and get swept up in ghoulish shenanigans in this "laugh-out-loud, high-action read" ( Kirkus Reviews , starred review) for fans of Best Nerds Forever and the Fear Street series .

One haunted orphanage + two types of ghosts + three freaked-out friends = plenty of trouble.

Best friends Aldo, Pen, and Jasper are braced for a boring summer. And equally dull summer journal writing assignments. That is, until they see a slightly transparent boy with a bad haircut appear by the soccer field and then disappear into the woods beyond. The boys follow him and discover the long-abandoned Grauche Orphanage for Orphans, a house in the woods that is most definitely haunted.

But the ghosts are not the problem. They have been trapped at the orphanage by a cranky poltergeist who erupts into violent tantrums if they put even a spectral toe across the property line. The ghosts ask the boys to help free them--but who is the angry poltergeist and what does it want? To solve the mystery, the trio must investigate the orphanage's dark past, evade Aldo's ghastly older brother, borrow a skeptical librarian, and duck lots of flying furniture, all while failing to agree on almost anything. Can they defeat the evil entity and rescue the ghosts before their parents catch on and ground them for eternity?