"The letters released today reflect the natural desire for companionship when isolated for 23 hours a day, and clearly demonstrate Casey's unconditional love for her daughter Caylee," the statement said. "Casey Anthony maintains her innocence and looks forward to her day in court."
In the letters, Anthony says she thinks about her deceased daughter daily.
"I miss my Caylee so much," she wrote in one of the letters.
"Not a day goes by that I don't think about Caylee and wish that I could have protected her better," another reads.
Adams told investigators Anthony told her that there was no Zenaida Gonzalez, the babysitter Anthony originally claimed had abducted Caylee. Adams said Anthony told her that Zenaida was the first name of a childhood friend, according to the court documents.
Anthony's defense team said Adams' sole purpose in corresponding with Anthony was "to create leverage to get out of prison early."
In another revelation, in the letters released today Casey Anthony writes she was sexually abused by her brother when she was younger.
"The worst part is, when I tried to confide in someone before... they turned on me. I was to blame for my own brother walking into my room at night and feeling my breasts while I slept," she wrote.
The Anthony family categorically denied such allegations.
"The Anthony family denies that there was any improper sexual behavior in their family nor was there ever a time when Casey told them of sexually inappropriate conduct by her brother or father," the family's attorney, Brad Conway, said in a statement.
Amidst the pile of flowery, hand-written notes, Anthony repeatedly complains about what she called her family's betrayal.
Anthony said she learned that after jail house visits, her brother and father were reporting on her to the police early on in the investigation.
"I find out that my brother was acting according to scripts, via law enforcement, when he came to visit me back in July and August and he was reporting back to them with whatever I told them," she wrote.
After Anthony found out her mother Cindy Anthony had applied for a trademark for Caylee's name, she wrote in one letter, "B-E-T-R-A-Y-A-L!!! I'm so sick to my stomach even thinking about this.
"I've done everything possible to hold my family together and I continue to get stomped on, thrown under the bus, and it doesn't surprise me anymore when it happens," she wrote.
Beyond the complaints and more personal revelations, Anthony discusses boys and letters she received from admirers repeatedly asking to marry her. She talks about what's on television, often punctuating with exclamation points and smiley- or frowny-faces.
"I need a vacation!," she wrote. "I am thinking of Costa Rica... want to come with? (Unfortunately we have to wait until we are released. Someday!)"
Anthony's defense team reportedly did not object to the letters' release, telling ABC News' Orlando Fla. affiliate WFTV they are not concerned with the content of the letters.