Some more reviews are coming in. Kirkus (which is sadly going out of print soon and whose reviewers are notoriously hard to please) says
Brandeis has created an appealing, quirky protagonist, still childlike in her sensibilities and understanding. Convinced that she is going to die young, like her almost-namesake Willie Lincoln, she diagnoses the pain in her developing breasts as incipient heart failure. She worries that her mother will go crazy and her father will be assassinated. Middle-school readers will know better but enjoy this humorous first-person glimpse into her misconstrued world. Adults don’t see so clearly, either. In her first novel for young readers, the author goes beyond usual stories of the civil-rights movement, demonstrating well-intentioned but tone-deaf gestures of white supporters and the discomfort of change.Booklist calls My Life with the Lincolns an "informative, clear, personal and passionate novel." And the PhiloBiblos blog has a fantastic review here.
Watch for a contest coming soon and a website relaunch (my husband Michael is doing the web design, which is very cool. He didn't think he'd have time, but it's coming together beautifully!)
Update: It appears Amazon has come to their senses. Pre-order away. :)