I picked this up last summer;
"Tiger I On The Eastern Front" by Jean Restayn, published by Histoire & Collections
It is in English.
It does not have a depth of detail, that is not its intent.
It covers all the major Abt.'s that operated Tiger I's in the east, with many good, interesting historic b&w photo's, some of which I had never seen before, and it has a good number of colour drawings of the Tigers of each unit.
For the modeller it is sort of like a car or truck brochure like the dealers hand out; you can go through and see all the "colours and options" in one handy source and then do more detailed research on your particular interest.
As a panzer and Tiger adictic
, I would not be without a copy.
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"Luck favours the prepared!."