Twelfth Doctor story Face the Raven (2015) features in issue 20 of Obverse Books’ Black Archive unofficial series of essays exploring Doctor Who. The book is written by Sarah Groenewegen and is available now, RRP £6.99 from obversebooks.co.uk. Issue 21 of The Black Archive – Heaven Sent by Kara Dennison – will be published in July with issue 22 – Hell Bent by Alyssa Franke – following in August.