I feel bad admitting this, but this is actually the first book by Avi that I've ever read. I remember trying to struggle through The True Confessions of Charlotte Doyle when I was in middle school, but I hated it; I hadn't picked up one of his books since. However, Coach Tucker recommended Nothing But The Truth to me, so I thought I'd give it a try.
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Phillip's suspension soon spirals into national news as people lash out against the teacher, blaming her for a decision that was really made by the school's assistant principal.
The book posed a really interesting question about which takes precedence: school rules or national pride? It really had me thinking, and I felt terrible for the teacher - I guess we tend to sympathize with those in similar situations :)
Also, the novel is written in various formats: some pages were memos from the principal, some were transcriptions of phone conversations; there were entries from Phillip's journal, newspaper articles, and even an excerpt from one of his English tests! This made the novel go by really quickly and kept my interest.