Judging by the comments in other threads, there's a lot of interest in these books, published by Ladybird: They've been listed on Amazon.co.uk for some time but now they are shipping. (thanks go to Mark S for the heads-up). They're not listed on Amazon.com so I don't know about availability outside the UK. As you can see from the pictures they come with a minifig and look to be a very cheap way of getting a shark- or octopus-man. Here are some direct links to Amazon.co.uk:
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