Bumped to avoid taking
another thread off topic
In terms of e-Readers, the current "starter" choice is between...
Kindle basic ~£70
Kindle Paperwhite ~£120
Kobo Clara ~£110
All 3 are 6" displays, and reasonably pocketable. If you do intend to pocket it, a case is advisable, preferably a flip case similar to
this official version. The leather cases that hold the reader using elastic across the corners add quite a lot of bulk.
All 3 are illuminated. The Kobo has the option of a warm orange tone which you may prefer in the evening
All 3 are touchscreen controlled. If you want buttons, you've got to pay more for one of the more up-market models.
The Basic has a lower resolution display
The Paperwhite is waterproof
The Paperwhite and Basic do bluetooth (for audio books)
The Paperwhite and Clara are 8 GB, the Basic is 4 GB (nominal sizes - the OS uses some)
For normal books, 4 GB is plenty (well over 1000 books). You may want more for audio books or manga (comics)
For the Kindles, "Special Offers" is adverts on the sleep screen. You pay an extra £10 not to have them.
The "lasts weeks" battery life claims are based on half an hour a day or something. It's actually page turns that sets the life (for reading). I find I want to charge every 3 or 4 books (regular paperback size).
Both Kindle and Kobo tie you in to their book stores to some extent - certainly if you buy a book and want it to just appear on the reader over wifi, like magic.
If you buy current commercial e-books, they will almost certainly be encrypted (DRM), so that you can only read books bought on the Kindle store on a Kindle reader, and only read books bought at the Kobo store on a Kobo reader. It's therefore worth looking at the two stores beforehand, and seeing which you prefer.
Prices are generally similar if not the same, and both Kindle and Kobo have monthly "special offer" packages with maybe 200 books reduced to 99p. Strangely enough, the books concerned are the same on both, as far as I've seen.
Kobo plays better with those lending libraries that offer e-books (or so I've heard).
There are free books available, either out of copyright (i.e. old classics) from Project Gutenberg and the like, or illegally from wherever google might find.
I've got a Paperwhite and a Kobo Aura One (7.8" screen, for home use).
I get round the incompatibility issue by (illegally) decrypting and converting the books (using Calibre, with plugins), so whatever I buy can be read on either reader. Google is your friend.
Most of what I buy comes from the Kindle store - I just find it's easier.