Here are a couple books on the single seat Lotus Formula 1 racing cars. Sold together

1. The Single-Seat Lotus Formula 1 & Indy Cars 

a definitive history by Doug Nye

Published by Newport Press  1978  Hardcover with dust jacket in Mylar sleeve

ISBN 0930880021  201 pages  

Covers the Lotus 12, 16, 18, 24, 25, 29, 33, 34, 38, 42F, 43, 49, 16-49 T, 56, 56B, 63, 64, 72, 76, 77, 78, and 79

along with specifications

2. The Lotus 49

by David Hodges  Published by Arco Publishing 1970

Hardcover w/ dust jacket in Mylar sleeve  

ISBN 0668023333  80 pages

Both titles are generously illustrated