Book collection culling advice

Hi all.

I just picked up Dan Jones' The Plantagenets and Helen Castor's The Eagle and the Hart because there's been so much raving about them. That made me think it was time to ask for advice about whether or not I should get rid of some books that are inaccurate and/or obsolete. Here are some of my collection:

Richard I - Gillingham

King John - Warren

Simon de Montfort - Maddicott

Edward I - Prestwich

The Three Edwards - Prestwich

A Distant Mirror - Tuchman

The Hundred Year's War - Jones

Edward Prince of Wales - Barber

Richard II - Saul

Henry V - Allmand

The War of the Roses - Weir

The War of the Roses - Seward

Warwick the Kingmaker - Hicks

Edward IV - Ross

Battle of Towton - Boardman

Battles of Barnet and Tewkesbury - Hammond

Battle of Bosworth - Bennett

Bosworth Field & the War of the Roses - Rouse

Richard III - Kendall

Richard III - Ross

Any of these I should toss? Thanks to anyone who would know and take the time to advise.