Back with Mr Cross and his series about Wold War II for younger readers, this time on technology, in what is an interesting read. Of the four books I have reviewed in this series, three of them had no ratings at all which either means they are not well known, or read, or the readers don't use this site, either way, it is a pity because these books do convey some interesting information about world war II and are well worth reading for younger readers.