Books featuring a lot of DMUs
Dawn of the Diesels Part One
John Spencer Gilks

Silver Link Publishing
ISBN 1 85794 096 2

A good insight into the early days, with lots of other interesting stuff like DMU posters.

Amendments


Dawn of the Diesels Part Two
John Spencer Gilks

Silver Link Publishing
ISBN 1 85794 110 1

A follow up book, again having a very high percentage of DMU pics in the 1956-66 period.

Amendments


Modern Branch Line Album
J.A.M. Vaughan

Ian Allan
ISBN 0 7110 1030 7

Another book with a very high percentage of DMUS. Looks mainly at the 1960 to 1979 period.

Diesels on the Scottish Region
S Rickard

Bradford Barton
ISBN 0 85153 190 3

Lots of nice Swindon 126s in this one!

Branch Lines Round Britain
John A. M. Vaughan

Bradford Barton
ISBN 0 85153 246 2 

And what kind of trains run on branch lines?

Branch Lines into the Eighties
H I Quayle and Stanley C Jenkins

David & Charles 1980
0 7153 7980 1

Thirty-nine branch lines described, most with DMU pictures including
some from the early days