When I studied for my HAM license, I bought a study book. I believe it was this one linked below (although I had the previous version/edition as it was a few years ago):
Link:
Technician License | Ham Radio School
There are lots of review books out there for the technician license, and I don't know which one is best - I liked this one. After I took the test I gave the book to a friend.
The HAM radio license test itself (my numbers may be slightly off) is a 35 question multiple choice question test, with the 35 questions randomly chosen out of a pool of 400 questions.
The book I used (linked above) is broken down into chapters, and the book also includes a website with the questions organized to go along with the book chapters. I thought the book was easy to read (not too technical, and not too dumbed-down). After reading a chapter, you go to the website and answer the questions (that come from the pool of 400 questions) that relate to that chapter's subject. So once you finish chapter one, you go to the link and they'll have a dozen or so questions that pertain to what you read in chapter one (actual questions that come from the pool of 400 questions that are used for the actual test). I would sit down in the evening and do a chapter or two depending on how much time I had, and then go online and answer the questions for those chapters.
Once you've read the book and answered all the questions, you're pretty much ready for the test. I went through the 400 questions twice again before taking the test. There are websites you can download on your phone, and go over questions while standing in a grocery store line or wherever.
I scheduled the test in advance so I knew I had a self-imposed deadline to do the book and take the test. I wanted to read a book and understand the content vs. just going to a website and "doing the questions", which some folks do. Kids take the test and pass.
It has been a few years since I took the test, and I've forgotten a lot, and never really did anything with it. So I bought a HAM Radio for Dummies book (4th edition). I just got back from a week in Florida, so I haven't even cracked it open yet. I don't think I'd recommend this Dummies book as a first-line study book for the test - I think it covers more than you would need to take the test (which in this case now is what I wanted).
Link:
Ham Radio for Dummies (Edition 4) (Paperback) - Walmart.com
Along with the Dummies book, before heading to Florida I ordered a little SURECOM SWR meter, since the SWR meter I currently have only works for CB radios. This one is a VHF/UHF meter (and covers GMRS). Other than opening the box to look at it, I haven't done anything with it (just got home after 0200 this morning - I still haven't unpacked!). But I will bring it to Jarbidge if folks want to check out their radio's SWR during the trip. I ordered it after watching this video below, and it was the SWR meter he was using in the video:
Link:
(356) How To Tune A GMRS Antenna & SWR Basics - YouTube
My new BTECH UV 25x2 radio I ordered is sitting in the shop too. So many projects, so little time. I took it out of the box, looked at it (it is small), and then put it back in the box. Hopefully later this week I'll get it installed. I'll have it mounted for the IDBDR trip.
I've got it on my calendar to leave for Jarbrige on 25 July to get there in plenty of time.