Jessie Burton's The Miniaturist (Picador) is the first number one of 2015. 

In the seven days ending 3rd January, the paperback edition of the acclaimed debut climbed 44 places to reach the summit with 21,712 copies sold. Although its official publication date was scheduled for the 1st of January, retailers were stocking the paperback edition in the run-up to Christmas, from mid-December.  In the final two weeks of 2014, the novel sold 11,774 copies, over 8,200 of which were sold in the week ending 27th December.  Unsurprisingly, the hardback edition slips from number one to 15th place on ...