John Sweeney. We last saw this bookcase securing the unconditional surrender of Toby Young and here we get a close quarters view of its fearsome power. With this, John asks us to value the journey. Every step on our climb brings us new understanding. He is on the journey himself.

Ed Miliband brings down the credibility hammer with such force that the world begins to bend at the edges. There is no subtlety, no sly artistry. Ed is in our face and he's brought his mates. It's a tidal wave of credibility and Ed is Poseidon in his chariot, trident raised.

Jonathan Wilson's powerful "Ah Mr Bond, I've been expecting you," vibe is supported by the presence of a towering henchman. The visible side wall and ceiling show the bookcase barely fits its bulk into the room. "Talk? No, Mr Bond. I expect you to acknowledge my credibility."

Gregg Wallace signed up for a monthly Encyclopaedia Brittanica and now regrets it. There they sit, the sorest thumbs that ever stuck out, buckling his shelves while Gregg stares confusedly at the refund policy. His bookcase wasn't built for this. Google distributed load, Gregg!

Bernardine Evaristo. A Booker winner in front of a bookcase is a devastating power move that creates a feedback loop of credibility. It's as if Louis Pasteur sat in a bath of milk in a world where people were impressed by milk.

David Olusoga revisited. Last time, David's guitars were wrongly maligned. Here, his power bookcase brings the drama alone. To his left, a Bafta flex, Africa Dances facing outward and those books bowing the top shelf are like grimoires. Centrally, the seven figures. Wisdom? Sins?

David Olusoga. When Barcelona lost 4-0 to PSG in the first leg of their Champions League tie it seemed all over. David puts himself in a hole of similar size with those guitars. It needs a mighty bookcase to haul him out and he unfurls one along the wall. A credibility remontada.

Grant Shapps. The bookcase reaches a supportive arm round his shoulder but the outward facing books, like a bookcase combover, concern. The trophy, flag and book on Britain give a gift shop feel and Grant's name there shows he is the product. Nudge is present but this is a shove.

Michelle and Barack Obama. The bookshelves are half-empty because most of the books dived for cover before anyone thought they had the cheek to claim the Obamas needed them. The ones left behind reacted too late and are hoping we understand they don't mean anything by it.

Stephen Reicher. Books spread across Stephen's wall like a climbing plant. If he isn't careful he'll find them creeping up his back and swallowing him but for now we get a balanced credibility grab of books and photos, knowledge and experience. Hopefully he has secateurs handy.

Steve Baker. This is extraordinary. It's the An Oak Tree of credibility. Steve asks a lot of us here and it only succeeds if we rise to his challenge. Credibility is physically present but if we deny that then it's just a stack of textbooks on a shelf and Steve looks ridiculous.

Lisa Nandy. A spectacular, geometrical wonder. The lighting and the symmetry, with the skylights' sweep echoed by Lisa's hair and the room's two sides mirroring give this the feel of biblical allegory. Bookcases are seeded everywhere round her, like followers gathering to listen.

Gordon Brown. A standard bookcase as credibility wallpaper presentation but notable for the double-stacking everywhere and what appear to be three copies of the same book about Robert Kennedy. A kitchen sink approach.

This is a great example of getting it all wrong. Here Iain Duncan Smith's bookcase is narrower than he is. Instead of giving him credibility it makes him look foolish.

Simon Armitage. The bookcase slashes down and Simon places himself so that the sloping books above and the straight ones below seem to be fed into him. On the other side is blank space because all knowledge has been absorbed. He's like a snake consuming a meal.

Rachel Reeves has taken no chances here. Everything is bookcase. No gap has been left where credibility might leak away. Utilising three dimensions, sending a bookcase charging at us along a wall, leaves us no sanctuary. We are overwhelmed, swamped by credibility.