which books are best for uceed preparation ???

Hello,
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Firstly let me cleara you the point that you can find no authors for UCEED preparation.Now here are some topics they you should go for preparation.
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Part A topics,
Observation and design sensitivity
Visualization and spatial ability
Analytical and logical reasoning
Environmental and social awareness
Design thinking and problem solving
Language and creativity

Part B,
Drawing.
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You need to have a grip on particular points when your are going through above mentioned topics like,
In observation and design sensitivity you should have ability to detect hidden properties in people, ordinary things, event and situations
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And when coming to visualization and spatial ability questions will be From manipulation of 2d and 3d shapes,objects and there spatial relation.
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In the same way mentioned above,you need to refer some important points from topics mentioned above. Here is the link where you will be getting detailed information about it,
https://design.careers360.com/articles/uceed-syllabus (http://www.careeers360.com)

A  point to be note is UCEED preparation is not going to help in examination and most of them advised that NTSE books are useful.If you want to even go for this, here is the link,
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https://school.careers360.com/articles/best-books-for-ntse/amp
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Best of luck