The Pierce Peanut Gallery recommends Sara Maxwell's home school series. There is a nice review of these at: http://homeschoolblogger.com/homeschoolbookreview/757828.
A suggestion from Mimi:A couple that my kids enjoyed come to mind:'Schooled' by Gordon Korman -- a homeschooled boy tries to adjust to regular school while his grandmother/teacher is in the hospital with a broken hip. Turns out, regular school has to adjust to him! http://www.amazon.com/Schooled-Gordon-Korman/dp/1423105168/ref=sr_1_1?ie=UTF8&qid=1363026869&sr=8-1&keywords=schooled'Surviving the Applewhites' -- a troubled teen, kicked out of every school, goes to live with an eclectic, artistic, homeschooling family.http://www.amazon.com/Surviving-Applewhites-Stephanie-S-Tolan/dp/075691941X/ref=sr_1_1?s=books&ie=UTF8&qid=1363026951&sr=1-1&keywords=Surviving+the+Applewhites
I got a copy of Schooled by Gordon Korman. I am not sure if this is an ideal choice for home schooled children, since the main character is a former home schooler adapting to regular school.
M. Sittnick says:"The Misplaced Spy" by Elizabeth Altham is about a mostly homeschooling family in New England that gets entangled in Cold War era (mid-eighties) espionage. It is available on Amazon.com. There is also a CD audiobook version that includes a free copy of the print edition.http://www.amazon.com/The-Misplaced-Spy-Elizabeth-Altham/dp/0982478720/ref=sr_1_sc_1?ie=UTF8&qid=1363203381&sr=8-1-spell&keywords=the+mispaced+spy