Look and Learn didn't always get it right. Back in 1975, IPC Magazines put out the Look and Learn 9th Book of the Wonders of Nature 1976 and accidentally transposed a caption on the endpapers which meant that the Death Cap toadstall, fatal in 95% of cases, was not poisonous. Oops.
The error was quickly spotted and IPC sent out a warning to newsagents (below) to try and recall copies of the annual that had already been distributed and sold. The warning obviously worked as I've yet to find a copy of the book with the error intact or any mention of a fatality in connection with people confidently eating Death Cap mushrooms after reading the book.