No, it’s not a new avant-garde pop band.
It’s a new series of books dealing with the statements and theology of the Westminster Assembly.
From RHB blog.
“John Bower has joined historian Chad Van Dixhoorn in launching three new series of books by the Westminster Assembly, and one series of new and classic studies on the Assembly, all being published by Reformation Heritage Books. It is hoped that both texts and studies will stimulate further research in the Assembly and the religious dimension of English civil war politics. Certainly future publications on British post-Reformation theology and Puritanism will be enriched by these publications, briefly described here.”
Principal Documents of the Westminster Assembly. This series will produce the six chief works authored by the Assembly for covenanted uniformity of religion in England: the Confession of Faith, Larger Catechism, Shorter Catechism, Directory for Public Worship, Directory for Church Government, and The Psalter. Each volume will contain a historical introduction, a critical text, and multi-column comparisons of original manuscripts and early editions. The inaugural volume, The Larger Catechism, has been prepared by John Bower and scheduled for a launch in March 2010.
Writings of the Westminster Divines. The aim of this series is to provide scholarly editions of texts by Westminster Assembly members and commissioners. Volumes will include previously unpublished manuscripts as well as republications of rare editions. Carefully determined editorial standards will be used to ensure an authoritative product that is accessible to modern readers, while remaining reliable for students and scholars.
Westminster Assembly Facsimiles. With this new series, Reformation Heritage Books and the Westminster Assembly Project are providing electronic and print access to publications by Assembly members in their original form. Free PDF downloads will be made available through the Westminster Assembly Project website. The same text can be purchased for your collection in paperback and hard cover from Reformation Heritage Books.
Studies of the Westminster Assembly. Complementing the primary source material in the other series, the Assembly studies will provide access to classic studies that have not been reprinted and to new studies, providing some of the best existing research on the Assembly and its members.
mgpcpastor's blog 
thanks for the post
Looking forward to the books.
Apart from Ridgeley and Vos there isn’t a lot of material in circulation directly dealing the Larger Catchism, so I’ll be interested to see Bower’s Larger Catechism volume.