The dragonsitter's island Dragonsitter series, book 4.

Book 4 in a fresh, funny chapter book series, told in a series of emails, about a boy named Eddie and two naughty pet dragons! Eddie is dragonsitting again, this time on Uncle Morton's island! As if the dragons weren't enough, there are some strange things afoot: the local sheep are disappearing, and Eddie swears he sees a mysterious creature in the lake (could it be the Loch Ness Monster??). It seems Eddie is in for a beastly surprise! Thi...